55564231 has 2 divisors, whose sum is σ = 55564232. Its totient is φ = 55564230.

The previous prime is 55564217. The next prime is 55564283. The reversal of 55564231 is 13246555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55564231 - 2⁹ = 55563719 is a prime.

It is a super-2 number, since 2×55564231² = 6174767533242722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55564193 and 55564202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55564291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27782115 + 27782116.

It is an arithmetic number, because the mean of its divisors is an integer number (27782116).

Almost surely, 2^55564231 is an apocalyptic number.

55564231 is a deficient number, since it is larger than the sum of its proper divisors (1).

55564231 is an equidigital number, since it uses as much as digits as its factorization.

55564231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 31.

The square root of 55564231 is about 7454.1418687868. The cubic root of 55564231 is about 381.5912749603.

The spelling of 55564231 in words is "fifty-five million, five hundred sixty-four thousand, two hundred thirty-one".