51965532 has 144 divisors (see below), whose sum is σ = 151351200. Its totient is φ = 14929920.

The previous prime is 51965527. The next prime is 51965569. The reversal of 51965532 is 23556915.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 476694 + ... + 476802.

It is an arithmetic number, because the mean of its divisors is an integer number (1051050).

Almost surely, 2^51965532 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 51965532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75675600).

51965532 is an abundant number, since it is smaller than the sum of its proper divisors (99385668).

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

51965532 is a wasteful number, since it uses less digits than its factorization.

51965532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 191 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 51965532 is about 7208.7122289630. The cubic root of 51965532 is about 373.1686280980.

The spelling of 51965532 in words is "fifty-one million, nine hundred sixty-five thousand, five hundred thirty-two".