1057321511 has 4 divisors (see below), whose sum is σ = 1119516912. Its totient is φ = 995126112.

The previous prime is 1057321501. The next prime is 1057321537. The reversal of 1057321511 is 1151237501.

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 1057321511 - 2¹⁰ = 1057320487 is a prime.

It is a super-2 number, since 2×1057321511² = 2235857555246646242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057321501) 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, 31097675 + ... + 31097708.

It is an arithmetic number, because the mean of its divisors is an integer number (279879228).

Almost surely, 2^1057321511 is an apocalyptic number.

1057321511 is a deficient number, since it is larger than the sum of its proper divisors (62195401).

1057321511 is an equidigital number, since it uses as much as digits as its factorization.

1057321511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62195400.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 1057321511 is about 32516.4806059942. The cubic root of 1057321511 is about 1018.7532861700.

The spelling of 1057321511 in words is "one billion, fifty-seven million, three hundred twenty-one thousand, five hundred eleven".