551526121 has 4 divisors (see below), whose sum is σ = 583968852. Its totient is φ = 519083392.

The previous prime is 551526103. The next prime is 551526149. The reversal of 551526121 is 121625155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148962025 + 402564096 = 12205^2 + 20064^2 .

It is a cyclic number.

It is not a de Polignac number, because 551526121 - 2⁹ = 551525609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551526121.

It is not an unprimeable number, because it can be changed into a prime (551526221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16221340 + ... + 16221373.

It is an arithmetic number, because the mean of its divisors is an integer number (145992213).

Almost surely, 2^551526121 is an apocalyptic number.

It is an amenable number.

551526121 is a deficient number, since it is larger than the sum of its proper divisors (32442731).

551526121 is a wasteful number, since it uses less digits than its factorization.

551526121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32442730.

The product of its digits is 3000, while the sum is 28.

The square root of 551526121 is about 23484.5932687794. The cubic root of 551526121 is about 820.0783788851.

The spelling of 551526121 in words is "five hundred fifty-one million, five hundred twenty-six thousand, one hundred twenty-one".