51472521 has 12 divisors (see below), whose sum is σ = 74736948. Its totient is φ = 34136064.

The previous prime is 51472511. The next prime is 51472523. The reversal of 51472521 is 12527415.

It can be written as a sum of positive squares in 2 ways, for example, as 36542025 + 14930496 = 6045^2 + 3864^2 .

It is not a de Polignac number, because 51472521 - 2⁵ = 51472489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51472523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13080 + ... + 16553.

It is an arithmetic number, because the mean of its divisors is an integer number (6228079).

Almost surely, 2^51472521 is an apocalyptic number.

It is an amenable number.

51472521 is a deficient number, since it is larger than the sum of its proper divisors (23264427).

51472521 is a wasteful number, since it uses less digits than its factorization.

51472521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29832 (or 29829 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 51472521 is about 7174.4352390972. The cubic root of 51472521 is about 371.9847591744.

Adding to 51472521 its reverse (12527415), we get a palindrome (63999936).

The spelling of 51472521 in words is "fifty-one million, four hundred seventy-two thousand, five hundred twenty-one".