551213972 has 6 divisors (see below), whose sum is σ = 964624458. Its totient is φ = 275606984.

The previous prime is 551213953. The next prime is 551213987. The reversal of 551213972 is 279312155.

551213972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 535181956 + 16032016 = 23134^2 + 4004^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68901743 + ... + 68901750.

It is an arithmetic number, because the mean of its divisors is an integer number (160770743).

Almost surely, 2^551213972 is an apocalyptic number.

It is an amenable number.

551213972 is a deficient number, since it is larger than the sum of its proper divisors (413410486).

551213972 is a wasteful number, since it uses less digits than its factorization.

551213972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137803497 (or 137803495 counting only the distinct ones).

The product of its digits is 18900, while the sum is 35.

The square root of 551213972 is about 23477.9465030483. The cubic root of 551213972 is about 819.9236355616.

The spelling of 551213972 in words is "five hundred fifty-one million, two hundred thirteen thousand, nine hundred seventy-two".