551631361 has 4 divisors (see below), whose sum is σ = 551807424. Its totient is φ = 551455300.

The previous prime is 551631277. The next prime is 551631371. The reversal of 551631361 is 163136155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551631361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551631371) 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, 83245 + ... + 89626.

It is an arithmetic number, because the mean of its divisors is an integer number (137951856).

Almost surely, 2^551631361 is an apocalyptic number.

It is an amenable number.

551631361 is a deficient number, since it is larger than the sum of its proper divisors (176063).

551631361 is a wasteful number, since it uses less digits than its factorization.

551631361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176062.

The product of its digits is 8100, while the sum is 31.

The square root of 551631361 is about 23486.8337798010. The cubic root of 551631361 is about 820.1305369223.

The spelling of 551631361 in words is "five hundred fifty-one million, six hundred thirty-one thousand, three hundred sixty-one".