7172879551 has 4 divisors (see below), whose sum is σ = 7173049392. Its totient is φ = 7172709712.

The previous prime is 7172879507. The next prime is 7172879557. The reversal of 7172879551 is 1559782717.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7172879551 - 2²³ = 7164490943 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 (7172879557) 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, 33150 + ... + 124276.

It is an arithmetic number, because the mean of its divisors is an integer number (1793262348).

Almost surely, 2^7172879551 is an apocalyptic number.

7172879551 is a deficient number, since it is larger than the sum of its proper divisors (169841).

7172879551 is an equidigital number, since it uses as much as digits as its factorization.

7172879551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169840.

The product of its digits is 1234800, while the sum is 52.

The square root of 7172879551 is about 84692.8541908938. The cubic root of 7172879551 is about 1928.5512274304.

The spelling of 7172879551 in words is "seven billion, one hundred seventy-two million, eight hundred seventy-nine thousand, five hundred fifty-one".