55172351 has 4 divisors (see below), whose sum is σ = 59416392. Its totient is φ = 50928312.

The previous prime is 55172323. The next prime is 55172357. The reversal of 55172351 is 15327155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15327155 = 5 ⋅3065431.

It is a cyclic number.

It is not a de Polignac number, because 55172351 - 2¹⁰ = 55171327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55172357) 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, 2122001 + ... + 2122026.

It is an arithmetic number, because the mean of its divisors is an integer number (14854098).

Almost surely, 2^55172351 is an apocalyptic number.

55172351 is a deficient number, since it is larger than the sum of its proper divisors (4244041).

55172351 is a wasteful number, since it uses less digits than its factorization.

55172351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244040.

The product of its digits is 5250, while the sum is 29.

The square root of 55172351 is about 7427.8093001907. The cubic root of 55172351 is about 380.6920698370.

The spelling of 55172351 in words is "fifty-five million, one hundred seventy-two thousand, three hundred fifty-one".