55172007 has 36 divisors (see below), whose sum is σ = 90668760. Its totient is φ = 32266080.

The previous prime is 55172003. The next prime is 55172027. The reversal of 55172007 is 70027155.

It is not a de Polignac number, because 55172007 - 2² = 55172003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55172003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30708 + ... + 32454.

Almost surely, 2^55172007 is an apocalyptic number.

55172007 is a deficient number, since it is larger than the sum of its proper divisors (35496753).

55172007 is a wasteful number, since it uses less digits than its factorization.

55172007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804 (or 1790 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 55172007 is about 7427.7861439328. The cubic root of 55172007 is about 380.6912786294.

The spelling of 55172007 in words is "fifty-five million, one hundred seventy-two thousand, seven".