55156040 has 32 divisors (see below), whose sum is σ = 126447480. Its totient is φ = 21645312.

The previous prime is 55156027. The next prime is 55156067. The reversal of 55156040 is 4065155.

It can be written as a sum of positive squares in 4 ways, for example, as 52678564 + 2477476 = 7258^2 + 1574^2 .

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, 10889 + ... + 15128.

Almost surely, 2^55156040 is an apocalyptic number.

It is an amenable number.

55156040 is an abundant number, since it is smaller than the sum of its proper divisors (71291440).

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

55156040 is a wasteful number, since it uses less digits than its factorization.

55156040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26081 (or 26077 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 55156040 is about 7426.7112506142. The cubic root of 55156040 is about 380.6545505587.

The spelling of 55156040 in words is "fifty-five million, one hundred fifty-six thousand, forty".