1057457512531 has 4 divisors (see below), whose sum is σ = 1208522871472. Its totient is φ = 906392153592.

The previous prime is 1057457512487. The next prime is 1057457512549. The reversal of 1057457512531 is 1352157547501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1057457512531 - 2²³ = 1057449123923 is a prime.

It is a super-2 number, since 2×1057457512531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1057457512591) 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, 75532679460 + ... + 75532679473.

It is an arithmetic number, because the mean of its divisors is an integer number (302130717868).

Almost surely, 2^{1057457512531} is an apocalyptic number.

1057457512531 is a deficient number, since it is larger than the sum of its proper divisors (151065358941).

1057457512531 is an equidigital number, since it uses as much as digits as its factorization.

1057457512531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151065358940.

The product of its (nonzero) digits is 735000, while the sum is 46.

The spelling of 1057457512531 in words is "one trillion, fifty-seven billion, four hundred fifty-seven million, five hundred twelve thousand, five hundred thirty-one".