2056531 has 4 divisors (see below), whose sum is σ = 2068200. Its totient is φ = 2044864.

The previous prime is 2056517. The next prime is 2056547. The reversal of 2056531 is 1356502.

It is a happy number.

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 2056531 - 2⁷ = 2056403 is a prime.

It is a super-2 number, since 2×2056531² = 8458639507922, which contains 22 as substring.

It is a Duffinian number.

2056531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2056501) 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, 5566 + ... + 5923.

It is an arithmetic number, because the mean of its divisors is an integer number (517050).

2^2056531 is an apocalyptic number.

2056531 is a deficient number, since it is larger than the sum of its proper divisors (11669).

2056531 is a wasteful number, since it uses less digits than its factorization.

2056531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11668.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2056531 is about 1434.0610168330. The cubic root of 2056531 is about 127.1681695535.

The spelling of 2056531 in words is "two million, fifty-six thousand, five hundred thirty-one".