55402556 has 24 divisors (see below), whose sum is σ = 111336960. Its totient is φ = 23857200.

The previous prime is 55402553. The next prime is 55402573. The reversal of 55402556 is 65520455.

It is a super-2 number, since 2×55402556² = 6138886422666272, which contains 22 as substring.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32300 + ... + 33971.

It is an arithmetic number, because the mean of its divisors is an integer number (4639040).

Almost surely, 2^55402556 is an apocalyptic number.

It is an amenable number.

55402556 is an abundant number, since it is smaller than the sum of its proper divisors (55934404).

55402556 is a wasteful number, since it uses less digits than its factorization.

55402556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66305 (or 66303 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 55402556 is about 7443.2893266351. The cubic root of 55402556 is about 381.2208105933.

The spelling of 55402556 in words is "fifty-five million, four hundred two thousand, five hundred fifty-six".