551156940 has 96 divisors (see below), whose sum is σ = 1804992000. Its totient is φ = 139237056.

The previous prime is 551156939. The next prime is 551156987. The reversal of 551156940 is 49651155.

551156940 is a `hidden beast` number, since 5 + 51 + 1 + 569 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 551156895 and 551156904.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16600 + ... + 37119.

It is an arithmetic number, because the mean of its divisors is an integer number (18802000).

Almost surely, 2^551156940 is an apocalyptic number.

It is an amenable number.

551156940 is an abundant number, since it is smaller than the sum of its proper divisors (1253835060).

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

551156940 is a wasteful number, since it uses less digits than its factorization.

551156940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53756 (or 53748 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 551156940 is about 23476.7318849963. The cubic root of 551156940 is about 819.8953564661.

The spelling of 551156940 in words is "five hundred fifty-one million, one hundred fifty-six thousand, nine hundred forty".