56226621 has 32 divisors (see below), whose sum is σ = 86728320. Its totient is φ = 32076800.

The previous prime is 56226589. The next prime is 56226631. The reversal of 56226621 is 12662265.

56226621 = T₁₇₈ + T₁₇₉ + ... + T₆₉₉.

56226621 = 1151² + 1152² + ... + 1191².

It is a cyclic number.

It is not a de Polignac number, because 56226621 - 2⁵ = 56226589 is a prime.

It is a super-2 number, since 2×56226621² = 6322865818155282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56226631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38521 + ... + 39953.

It is an arithmetic number, because the mean of its divisors is an integer number (2710260).

Almost surely, 2^56226621 is an apocalyptic number.

It is an amenable number.

56226621 is a deficient number, since it is larger than the sum of its proper divisors (30501699).

56226621 is a wasteful number, since it uses less digits than its factorization.

56226621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517.

The product of its digits is 8640, while the sum is 30.

The square root of 56226621 is about 7498.4412380174. The cubic root of 56226621 is about 383.1016257350.

Adding to 56226621 its reverse (12662265), we get a palindrome (68888886).

The spelling of 56226621 in words is "fifty-six million, two hundred twenty-six thousand, six hundred twenty-one".