57211902 has 96 divisors (see below), whose sum is σ = 149610240. Its totient is φ = 15586560.

The previous prime is 57211897. The next prime is 57211909. The reversal of 57211902 is 20911275.

57211902 is a `hidden beast` number, since 572 + 1 + 1 + 90 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57211909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77049 + ... + 77787.

It is an arithmetic number, because the mean of its divisors is an integer number (1558440).

Almost surely, 2^57211902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57211902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74805120).

57211902 is an abundant number, since it is smaller than the sum of its proper divisors (92398338).

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

57211902 is a wasteful number, since it uses less digits than its factorization.

57211902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 57211902 is about 7563.8549695245. The cubic root of 57211902 is about 385.3264269292.

The spelling of 57211902 in words is "fifty-seven million, two hundred eleven thousand, nine hundred two".