551213532 has 24 divisors (see below), whose sum is σ = 1429072400. Its totient is φ = 183737808.

The previous prime is 551213521. The next prime is 551213563. The reversal of 551213532 is 235312155.

It is a happy number.

551213532 is a `hidden beast` number, since 5 + 5 + 121 + 3 + 532 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 551213496 and 551213505.

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, 2551807 + ... + 2552022.

Almost surely, 2^551213532 is an apocalyptic number.

It is an amenable number.

551213532 is an abundant number, since it is smaller than the sum of its proper divisors (877858868).

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

551213532 is a wasteful number, since it uses less digits than its factorization.

551213532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103842 (or 5103834 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 551213532 is about 23477.9371325506. The cubic root of 551213532 is about 819.9234173968.

Adding to 551213532 its reverse (235312155), we get a palindrome (786525687).

It can be divided in two parts, 55121 and 3532, that added together give a triangular number (58653 = T₃₄₂).

The spelling of 551213532 in words is "five hundred fifty-one million, two hundred thirteen thousand, five hundred thirty-two".