51901952 has 80 divisors (see below), whose sum is σ = 112693680. Its totient is φ = 23789568.

The previous prime is 51901933. The next prime is 51901963. The reversal of 51901952 is 25910915.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583124 + ... + 583212.

It is an arithmetic number, because the mean of its divisors is an integer number (1408671).

Almost surely, 2^51901952 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 51901952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56346840).

51901952 is an abundant number, since it is smaller than the sum of its proper divisors (60791728).

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

51901952 is an equidigital number, since it uses as much as digits as its factorization.

51901952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 51901952 is about 7204.3009376344. The cubic root of 51901952 is about 373.0163749708.

The spelling of 51901952 in words is "fifty-one million, nine hundred one thousand, nine hundred fifty-two".