51172344 has 32 divisors (see below), whose sum is σ = 142146000. Its totient is φ = 17057376.

The previous prime is 51172333. The next prime is 51172349. The reversal of 51172344 is 44327115.

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 (51172349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118239 + ... + 118670.

Almost surely, 2^51172344 is an apocalyptic number.

51172344 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

51172344 is an abundant number, since it is smaller than the sum of its proper divisors (90973656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51172344 is a wasteful number, since it uses less digits than its factorization.

51172344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236924 (or 236914 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 51172344 is about 7153.4847452133. The cubic root of 51172344 is about 371.2602364283.

Adding to 51172344 its reverse (44327115), we get a palindrome (95499459).

The spelling of 51172344 in words is "fifty-one million, one hundred seventy-two thousand, three hundred forty-four".