551421564 has 12 divisors (see below), whose sum is σ = 1286650344. Its totient is φ = 183807184.

The previous prime is 551421547. The next prime is 551421599. The reversal of 551421564 is 465124155.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22975887 + ... + 22975910.

It is an arithmetic number, because the mean of its divisors is an integer number (107220862).

Almost surely, 2^551421564 is an apocalyptic number.

It is an amenable number.

551421564 is an abundant number, since it is smaller than the sum of its proper divisors (735228780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551421564 is a wasteful number, since it uses less digits than its factorization.

551421564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45951804 (or 45951802 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

The square root of 551421564 is about 23482.3670868164. The cubic root of 551421564 is about 820.0265527789.

The spelling of 551421564 in words is "five hundred fifty-one million, four hundred twenty-one thousand, five hundred sixty-four".