551521255 has 16 divisors (see below), whose sum is σ = 700337664. Its totient is φ = 416083360.

The previous prime is 551521253. The next prime is 551521291. The reversal of 551521255 is 552125155.

It is not a de Polignac number, because 551521255 - 2¹ = 551521253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551521253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25609 + ... + 41938.

It is an arithmetic number, because the mean of its divisors is an integer number (43771104).

Almost surely, 2^551521255 is an apocalyptic number.

551521255 is a deficient number, since it is larger than the sum of its proper divisors (148816409).

551521255 is a wasteful number, since it uses less digits than its factorization.

551521255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67646.

The product of its digits is 12500, while the sum is 31.

The square root of 551521255 is about 23484.4896687154. The cubic root of 551521255 is about 820.0759670845.

The spelling of 551521255 in words is "five hundred fifty-one million, five hundred twenty-one thousand, two hundred fifty-five".