551113173 has 16 divisors (see below), whose sum is σ = 879269440. Its totient is φ = 339146352.

The previous prime is 551113153. The next prime is 551113181. The reversal of 551113173 is 371311155.

551113173 is a `hidden beast` number, since 551 + 11 + 31 + 73 = 666.

It is not a de Polignac number, because 551113173 - 2⁵ = 551113141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551113153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784711 + ... + 785412.

It is an arithmetic number, because the mean of its divisors is an integer number (54954340).

Almost surely, 2^551113173 is an apocalyptic number.

It is an amenable number.

551113173 is a deficient number, since it is larger than the sum of its proper divisors (328156267).

551113173 is a wasteful number, since it uses less digits than its factorization.

551113173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570145 (or 1570139 counting only the distinct ones).

The product of its digits is 1575, while the sum is 27.

The square root of 551113173 is about 23475.7997307866. The cubic root of 551113173 is about 819.8736534463.

The spelling of 551113173 in words is "five hundred fifty-one million, one hundred thirteen thousand, one hundred seventy-three".