55156404 has 24 divisors (see below), whose sum is σ = 128828448. Its totient is φ = 18366880.

The previous prime is 55156393. The next prime is 55156441. The reversal of 55156404 is 40465155.

It is a super-2 number, since 2×55156404² = 6084457804422432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15514 + ... + 18734.

It is an arithmetic number, because the mean of its divisors is an integer number (5367852).

Almost surely, 2^55156404 is an apocalyptic number.

It is an amenable number.

55156404 is an abundant number, since it is smaller than the sum of its proper divisors (73672044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55156404 is a wasteful number, since it uses less digits than its factorization.

55156404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4655 (or 4653 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 55156404 is about 7426.7357567103. The cubic root of 55156404 is about 380.6553879282.

The spelling of 55156404 in words is "fifty-five million, one hundred fifty-six thousand, four hundred four".