1056321511 has 8 divisors (see below), whose sum is σ = 1270762880. Its totient is φ = 857764728.

The previous prime is 1056321481. The next prime is 1056321527. The reversal of 1056321511 is 1151236501.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1056321511 - 2⁵ = 1056321479 is a prime.

It is a super-2 number, since 2×1056321511² = 2231630269202646242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056321551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3971001 + ... + 3971266.

It is an arithmetic number, because the mean of its divisors is an integer number (158845360).

Almost surely, 2^1056321511 is an apocalyptic number.

1056321511 is a deficient number, since it is larger than the sum of its proper divisors (214441369).

1056321511 is an equidigital number, since it uses as much as digits as its factorization.

1056321511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7942293.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1056321511 is about 32501.1001506103. The cubic root of 1056321511 is about 1018.4320106265.

The spelling of 1056321511 in words is "one billion, fifty-six million, three hundred twenty-one thousand, five hundred eleven".