1057156515 has 20 divisors (see below), whose sum is σ = 1895051664. Its totient is φ = 563816592.

The previous prime is 1057156493. The next prime is 1057156547. The reversal of 1057156515 is 5156517501.

It is a happy number.

1057156515 is a `hidden beast` number, since 10 + 5 + 71 + 565 + 15 = 666.

It is not a de Polignac number, because 1057156515 - 2⁵ = 1057156483 is a prime.

It is a super-2 number, since 2×1057156515² = 2235159794413890450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1057156515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1304727 + ... + 1305536.

Almost surely, 2^1057156515 is an apocalyptic number.

1057156515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1057156515 is a deficient number, since it is larger than the sum of its proper divisors (837895149).

1057156515 is an equidigital number, since it uses as much as digits as its factorization.

1057156515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610280 (or 2610271 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The square root of 1057156515 is about 32513.9433935658. The cubic root of 1057156515 is about 1018.7002909490.

The spelling of 1057156515 in words is "one billion, fifty-seven million, one hundred fifty-six thousand, five hundred fifteen".