57251232 has 192 divisors, whose sum is σ = 180956160. Its totient is φ = 17563392.

The previous prime is 57251179. The next prime is 57251239. The reversal of 57251232 is 23215275.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 57251196 and 57251205.

It is not an unprimeable number, because it can be changed into a prime (57251239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 854463 + ... + 854529.

It is an arithmetic number, because the mean of its divisors is an integer number (942480).

Almost surely, 2^57251232 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 57251232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90478080).

57251232 is an abundant number, since it is smaller than the sum of its proper divisors (123704928).

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

57251232 is a wasteful number, since it uses less digits than its factorization.

57251232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 138 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 57251232 is about 7566.4543876244. The cubic root of 57251232 is about 385.4147035316.

The spelling of 57251232 in words is "fifty-seven million, two hundred fifty-one thousand, two hundred thirty-two".