55524509 has 2 divisors, whose sum is σ = 55524510. Its totient is φ = 55524508.

The previous prime is 55524493. The next prime is 55524541. The reversal of 55524509 is 90542555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52157284 + 3367225 = 7222^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 55524509 - 2⁴ = 55524493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55524569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27762254 + 27762255.

It is an arithmetic number, because the mean of its divisors is an integer number (27762255).

Almost surely, 2^55524509 is an apocalyptic number.

It is an amenable number.

55524509 is a deficient number, since it is larger than the sum of its proper divisors (1).

55524509 is an equidigital number, since it uses as much as digits as its factorization.

55524509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 55524509 is about 7451.4769676890. The cubic root of 55524509 is about 381.5003220712.

The spelling of 55524509 in words is "fifty-five million, five hundred twenty-four thousand, five hundred nine".