51931412 has 12 divisors (see below), whose sum is σ = 97870836. Its totient is φ = 23968320.

The previous prime is 51931393. The next prime is 51931421. The reversal of 51931412 is 21413915.

It can be written as a sum of positive squares in 2 ways, for example, as 9759376 + 42172036 = 3124^2 + 6494^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499289 + ... + 499392.

It is an arithmetic number, because the mean of its divisors is an integer number (8155903).

Almost surely, 2^51931412 is an apocalyptic number.

51931412 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51931412 is a deficient number, since it is larger than the sum of its proper divisors (45939424).

51931412 is a wasteful number, since it uses less digits than its factorization.

51931412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998698 (or 998696 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

The square root of 51931412 is about 7206.3452595612. The cubic root of 51931412 is about 373.0869374030.

The spelling of 51931412 in words is "fifty-one million, nine hundred thirty-one thousand, four hundred twelve".