55552531 has 2 divisors, whose sum is σ = 55552532. Its totient is φ = 55552530.

The previous prime is 55552493. The next prime is 55552547. The reversal of 55552531 is 13525555.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55552531 - 2¹¹ = 55550483 is a prime.

It is a super-2 number, since 2×55552531² = 6172167401011922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55552493 and 55552502.

It is not a weakly prime, because it can be changed into another prime (55552591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27776265 + 27776266.

It is an arithmetic number, because the mean of its divisors is an integer number (27776266).

Almost surely, 2^55552531 is an apocalyptic number.

55552531 is a deficient number, since it is larger than the sum of its proper divisors (1).

55552531 is an equidigital number, since it uses as much as digits as its factorization.

55552531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18750, while the sum is 31.

The square root of 55552531 is about 7453.3570288830. The cubic root of 55552531 is about 381.5644895551.

The spelling of 55552531 in words is "fifty-five million, five hundred fifty-two thousand, five hundred thirty-one".