51901332 has 24 divisors (see below), whose sum is σ = 138403776. Its totient is φ = 14828928.

The previous prime is 51901309. The next prime is 51901361. The reversal of 51901332 is 23310915.

It is a happy number.

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, 308853 + ... + 309020.

It is an arithmetic number, because the mean of its divisors is an integer number (5766824).

Almost surely, 2^51901332 is an apocalyptic number.

It is an amenable number.

51901332 is an abundant number, since it is smaller than the sum of its proper divisors (86502444).

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

51901332 is a wasteful number, since it uses less digits than its factorization.

51901332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617887 (or 617885 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 51901332 is about 7204.2579076543. The cubic root of 51901332 is about 373.0148896633.

The spelling of 51901332 in words is "fifty-one million, nine hundred one thousand, three hundred thirty-two".