55172950 has 24 divisors (see below), whose sum is σ = 117282672. Its totient is φ = 18916320.

The previous prime is 55172917. The next prime is 55172977. The reversal of 55172950 is 5927155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78469 + ... + 79168.

It is an arithmetic number, because the mean of its divisors is an integer number (4886778).

Almost surely, 2^55172950 is an apocalyptic number.

55172950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55172950 is an abundant number, since it is smaller than the sum of its proper divisors (62109722).

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

55172950 is a wasteful number, since it uses less digits than its factorization.

55172950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157656 (or 157651 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 55172950 is about 7427.8496215257. The cubic root of 55172950 is about 380.6934475423.

The spelling of 55172950 in words is "fifty-five million, one hundred seventy-two thousand, nine hundred fifty".