55402551 has 6 divisors (see below), whose sum is σ = 80025920. Its totient is φ = 36935028.

The previous prime is 55402531. The next prime is 55402553. The reversal of 55402551 is 15520455.

55402551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55402551 - 2²² = 51208247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55402553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3077911 + ... + 3077928.

Almost surely, 2^55402551 is an apocalyptic number.

55402551 is a deficient number, since it is larger than the sum of its proper divisors (24623369).

55402551 is a wasteful number, since it uses less digits than its factorization.

55402551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6155845 (or 6155842 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 55402551 is about 7443.2889907621. The cubic root of 55402551 is about 381.2207991251.

The spelling of 55402551 in words is "fifty-five million, four hundred two thousand, five hundred fifty-one".