51931104 has 96 divisors (see below), whose sum is σ = 145877760. Its totient is φ = 16128000.

The previous prime is 51931093. The next prime is 51931127. The reversal of 51931104 is 40113915.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129304 + ... + 129704.

It is an arithmetic number, because the mean of its divisors is an integer number (1519560).

Almost surely, 2^51931104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51931104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72938880).

51931104 is an abundant number, since it is smaller than the sum of its proper divisors (93946656).

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

51931104 is a wasteful number, since it uses less digits than its factorization.

51931104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 51931104 is about 7206.3238894737. The cubic root of 51931104 is about 373.0861998211.

The spelling of 51931104 in words is "fifty-one million, nine hundred thirty-one thousand, one hundred four".