1157006531 has 2 divisors, whose sum is σ = 1157006532. Its totient is φ = 1157006530.

The previous prime is 1157006491. The next prime is 1157006549. The reversal of 1157006531 is 1356007511.

It is a strong prime.

It is an emirp because it is prime and its reverse (1356007511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157006531 is a prime.

It is a super-2 number, since 2×1157006531² = 2677328225553307922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1157006494 and 1157006503.

It is not a weakly prime, because it can be changed into another prime (1157006231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578503265 + 578503266.

It is an arithmetic number, because the mean of its divisors is an integer number (578503266).

Almost surely, 2^1157006531 is an apocalyptic number.

1157006531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157006531 is an equidigital number, since it uses as much as digits as its factorization.

1157006531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 1157006531 is about 34014.7987058574. The cubic root of 1157006531 is about 1049.8129768184.

The spelling of 1157006531 in words is "one billion, one hundred fifty-seven million, six thousand, five hundred thirty-one".