551249940 has 24 divisors (see below), whose sum is σ = 1543500000. Its totient is φ = 146999968.

The previous prime is 551249927. The next prime is 551249969. The reversal of 551249940 is 49942155.

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, 4593690 + ... + 4593809.

It is an arithmetic number, because the mean of its divisors is an integer number (64312500).

Almost surely, 2^551249940 is an apocalyptic number.

It is an amenable number.

551249940 is an abundant number, since it is smaller than the sum of its proper divisors (992250060).

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

551249940 is a wasteful number, since it uses less digits than its factorization.

551249940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9187511 (or 9187509 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 551249940 is about 23478.7124859946. The cubic root of 551249940 is about 819.9414691516.

The spelling of 551249940 in words is "five hundred fifty-one million, two hundred forty-nine thousand, nine hundred forty".