56510121 has 16 divisors (see below), whose sum is σ = 77414400. Its totient is φ = 36649488.

The previous prime is 56510119. The next prime is 56510173. The reversal of 56510121 is 12101565.

It is not a de Polignac number, because 56510121 - 2¹ = 56510119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56510221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24120 + ... + 26358.

It is an arithmetic number, because the mean of its divisors is an integer number (4838400).

Almost surely, 2^56510121 is an apocalyptic number.

It is an amenable number.

56510121 is a deficient number, since it is larger than the sum of its proper divisors (20904279).

56510121 is a wasteful number, since it uses less digits than its factorization.

56510121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 56510121 is about 7517.3213979449. The cubic root of 56510121 is about 383.7444249350.

Adding to 56510121 its reverse (12101565), we get a palindrome (68611686).

The spelling of 56510121 in words is "fifty-six million, five hundred ten thousand, one hundred twenty-one".