51644241 has 12 divisors (see below), whose sum is σ = 81378960. Its totient is φ = 31299480.

The previous prime is 51644231. The next prime is 51644251. The reversal of 51644241 is 14244615.

51644241 = 1370² + 1371² + ... + 1396².

It is an interprime number because it is at equal distance from previous prime (51644231) and next prime (51644251).

It is not a de Polignac number, because 51644241 - 2¹⁰ = 51643217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51644221) 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, 260731 + ... + 260928.

It is an arithmetic number, because the mean of its divisors is an integer number (6781580).

Almost surely, 2^51644241 is an apocalyptic number.

It is an amenable number.

51644241 is a deficient number, since it is larger than the sum of its proper divisors (29734719).

51644241 is a wasteful number, since it uses less digits than its factorization.

51644241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521676 (or 521673 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 51644241 is about 7186.3927668894. The cubic root of 51644241 is about 372.3979655373.

Adding to 51644241 its reverse (14244615), we get a palindrome (65888856).

The spelling of 51644241 in words is "fifty-one million, six hundred forty-four thousand, two hundred forty-one".