2056621531 has 8 divisors (see below), whose sum is σ = 2073443328. Its totient is φ = 2039817000.

The previous prime is 2056621513. The next prime is 2056621591. The reversal of 2056621531 is 1351266502.

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

It is a cyclic number.

It is not a de Polignac number, because 2056621531 - 2¹¹ = 2056619483 is a prime.

It is a super-2 number, since 2×2056621531² = 8459384243545567922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2056621493 and 2056621502.

It is not an unprimeable number, because it can be changed into a prime (2056621591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352246 + ... + 358036.

It is an arithmetic number, because the mean of its divisors is an integer number (259180416).

Almost surely, 2^2056621531 is an apocalyptic number.

2056621531 is a deficient number, since it is larger than the sum of its proper divisors (16821797).

2056621531 is a wasteful number, since it uses less digits than its factorization.

2056621531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8633.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2056621531 is about 45349.9893164265. The cubic root of 2056621531 is about 1271.7003555867.

The spelling of 2056621531 in words is "two billion, fifty-six million, six hundred twenty-one thousand, five hundred thirty-one".