551345216 has 28 divisors (see below), whose sum is σ = 1131806220. Its totient is φ = 266165760.

The previous prime is 551345161. The next prime is 551345231. The reversal of 551345216 is 612543155.

It can be written as a sum of positive squares in 2 ways, for example, as 471063616 + 80281600 = 21704^2 + 8960^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 146675 + ... + 150386.

Almost surely, 2^551345216 is an apocalyptic number.

It is an amenable number.

551345216 is an abundant number, since it is smaller than the sum of its proper divisors (580461004).

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

551345216 is a wasteful number, since it uses less digits than its factorization.

551345216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297102 (or 297092 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 551345216 is about 23480.7413852289. The cubic root of 551345216 is about 819.9887049803.

The spelling of 551345216 in words is "five hundred fifty-one million, three hundred forty-five thousand, two hundred sixteen".