551557404 has 24 divisors (see below), whose sum is σ = 1429963920. Its totient is φ = 183852432.

The previous prime is 551557397. The next prime is 551557417. The reversal of 551557404 is 404755155.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2553399 + ... + 2553614.

It is an arithmetic number, because the mean of its divisors is an integer number (59581830).

Almost surely, 2^551557404 is an apocalyptic number.

551557404 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

551557404 is an abundant number, since it is smaller than the sum of its proper divisors (878406516).

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

551557404 is a wasteful number, since it uses less digits than its factorization.

551557404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5107026 (or 5107018 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 36.

The square root of 551557404 is about 23485.2592917345. The cubic root of 551557404 is about 820.0938837579.

The spelling of 551557404 in words is "five hundred fifty-one million, five hundred fifty-seven thousand, four hundred four".