55158988 has 12 divisors (see below), whose sum is σ = 96888960. Its totient is φ = 27476432.

The previous prime is 55158973. The next prime is 55158989. The reversal of 55158988 is 88985155.

It is not an unprimeable number, because it can be changed into a prime (55158989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24556 + ... + 26707.

It is an arithmetic number, because the mean of its divisors is an integer number (8074080).

Almost surely, 2^55158988 is an apocalyptic number.

It is an amenable number.

55158988 is a deficient number, since it is larger than the sum of its proper divisors (41729972).

55158988 is a wasteful number, since it uses less digits than its factorization.

55158988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51536 (or 51534 counting only the distinct ones).

The product of its digits is 576000, while the sum is 49.

The square root of 55158988 is about 7426.9097207385. The cubic root of 55158988 is about 380.6613322253.

The spelling of 55158988 in words is "fifty-five million, one hundred fifty-eight thousand, nine hundred eighty-eight".