551213240 has 16 divisors (see below), whose sum is σ = 1240229880. Its totient is φ = 220485280.

The previous prime is 551213233. The next prime is 551213251. The reversal of 551213240 is 42312155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6890126 + ... + 6890205.

Almost surely, 2^551213240 is an apocalyptic number.

It is an amenable number.

551213240 is an abundant number, since it is smaller than the sum of its proper divisors (689016640).

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

551213240 is a wasteful number, since it uses less digits than its factorization.

551213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13780342 (or 13780338 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 551213240 is about 23477.9309139455. The cubic root of 551213240 is about 819.9232726146.

Adding to 551213240 its reverse (42312155), we get a palindrome (593525395).

The spelling of 551213240 in words is "five hundred fifty-one million, two hundred thirteen thousand, two hundred forty".