1057531117 has 4 divisors (see below), whose sum is σ = 1091645056. Its totient is φ = 1023417180.

The previous prime is 1057531103. The next prime is 1057531129. The reversal of 1057531117 is 7111357501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7111357501 = 43 ⋅165380407.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1057531117 is a prime.

It is a super-2 number, since 2×1057531117² = 2236744126846535378, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 34113907 = 1057531117 / (1 + 0 + 5 + 7 + 5 + 3 + 1 + 1 + 1 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057531147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17056923 + ... + 17056984.

It is an arithmetic number, because the mean of its divisors is an integer number (272911264).

Almost surely, 2^1057531117 is an apocalyptic number.

It is an amenable number.

1057531117 is a deficient number, since it is larger than the sum of its proper divisors (34113939).

1057531117 is an equidigital number, since it uses as much as digits as its factorization.

1057531117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34113938.

The product of its (nonzero) digits is 3675, while the sum is 31.

The square root of 1057531117 is about 32519.7035195587. The cubic root of 1057531117 is about 1018.8206017689.

Adding to 1057531117 its reverse (7111357501), we get a palindrome (8168888618).

The spelling of 1057531117 in words is "one billion, fifty-seven million, five hundred thirty-one thousand, one hundred seventeen".