51521952 has 24 divisors (see below), whose sum is σ = 135245376. Its totient is φ = 17173952.

The previous prime is 51521941. The next prime is 51521959. The reversal of 51521952 is 25912515.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (51521959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268248 + ... + 268439.

It is an arithmetic number, because the mean of its divisors is an integer number (5635224).

Almost surely, 2^51521952 is an apocalyptic number.

It is an amenable number.

51521952 is an abundant number, since it is smaller than the sum of its proper divisors (83723424).

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

51521952 is a wasteful number, since it uses less digits than its factorization.

51521952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536700 (or 536692 counting only the distinct ones).

The product of its digits is 4500, while the sum is 30.

The square root of 51521952 is about 7177.8793525665. The cubic root of 51521952 is about 372.1037980669.

The spelling of 51521952 in words is "fifty-one million, five hundred twenty-one thousand, nine hundred fifty-two".