551385812 has 24 divisors (see below), whose sum is σ = 976231872. Its totient is φ = 272480000.

The previous prime is 551385797. The next prime is 551385823. The reversal of 551385812 is 218583155.

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, 135812 + ... + 139812.

It is an arithmetic number, because the mean of its divisors is an integer number (40676328).

Almost surely, 2^551385812 is an apocalyptic number.

It is an amenable number.

551385812 is a deficient number, since it is larger than the sum of its proper divisors (424846060).

551385812 is a wasteful number, since it uses less digits than its factorization.

551385812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399 (or 4397 counting only the distinct ones).

The product of its digits is 48000, while the sum is 38.

The square root of 551385812 is about 23481.6058224305. The cubic root of 551385812 is about 820.0088299664.

The spelling of 551385812 in words is "five hundred fifty-one million, three hundred eighty-five thousand, eight hundred twelve".