551720492 has 6 divisors (see below), whose sum is σ = 965510868. Its totient is φ = 275860244.

The previous prime is 551720459. The next prime is 551720503. The reversal of 551720492 is 294027155.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68965058 + ... + 68965065.

It is an arithmetic number, because the mean of its divisors is an integer number (160918478).

Almost surely, 2^551720492 is an apocalyptic number.

It is an amenable number.

551720492 is a deficient number, since it is larger than the sum of its proper divisors (413790376).

551720492 is a wasteful number, since it uses less digits than its factorization.

551720492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137930127 (or 137930125 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 551720492 is about 23488.7311704996. The cubic root of 551720492 is about 820.1747059836.

The spelling of 551720492 in words is "five hundred fifty-one million, seven hundred twenty thousand, four hundred ninety-two".