51572241 has 32 divisors (see below), whose sum is σ = 87678720. Its totient is φ = 29348352.

The previous prime is 51572239. The next prime is 51572249. The reversal of 51572241 is 14227515.

51572241 is a `hidden beast` number, since 51 + 572 + 2 + 41 = 666.

It is not a de Polignac number, because 51572241 - 2¹ = 51572239 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51572249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66331 + ... + 67103.

It is an arithmetic number, because the mean of its divisors is an integer number (2739960).

Almost surely, 2^51572241 is an apocalyptic number.

It is an amenable number.

51572241 is a deficient number, since it is larger than the sum of its proper divisors (36106479).

51572241 is a wasteful number, since it uses less digits than its factorization.

51572241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1136 counting only the distinct ones).

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

The square root of 51572241 is about 7181.3815523199. The cubic root of 51572241 is about 372.2248250736.

Adding to 51572241 its reverse (14227515), we get a palindrome (65799756).

The spelling of 51572241 in words is "fifty-one million, five hundred seventy-two thousand, two hundred forty-one".