2056251521 has 8 divisors (see below), whose sum is σ = 2077483200. Its totient is φ = 2035044432.

The previous prime is 2056251479. The next prime is 2056251553. The reversal of 2056251521 is 1251526502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2056251521 is a prime.

It is a super-2 number, since 2×2056251521² = 8456340635229626882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2056259521) 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, 195626 + ... + 205868.

It is an arithmetic number, because the mean of its divisors is an integer number (259685400).

Almost surely, 2^2056251521 is an apocalyptic number.

It is an amenable number.

2056251521 is a deficient number, since it is larger than the sum of its proper divisors (21231679).

2056251521 is a wasteful number, since it uses less digits than its factorization.

2056251521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12295.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 2056251521 is about 45345.9096391284. The cubic root of 2056251521 is about 1271.6240864785.

The spelling of 2056251521 in words is "two billion, fifty-six million, two hundred fifty-one thousand, five hundred twenty-one".