57161620 has 24 divisors (see below), whose sum is σ = 122832864. Its totient is φ = 22332576.

The previous prime is 57161617. The next prime is 57161623. The reversal of 57161620 is 2616175.

57161620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (57161617) and next prime (57161623).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57161623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32374 + ... + 34093.

It is an arithmetic number, because the mean of its divisors is an integer number (5118036).

Almost surely, 2^57161620 is an apocalyptic number.

It is an amenable number.

57161620 is an abundant number, since it is smaller than the sum of its proper divisors (65671244).

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

57161620 is a wasteful number, since it uses less digits than its factorization.

57161620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66519 (or 66517 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 57161620 is about 7560.5304046740. The cubic root of 57161620 is about 385.2135095026.

Adding to 57161620 its reverse (2616175), we get a palindrome (59777795).

The spelling of 57161620 in words is "fifty-seven million, one hundred sixty-one thousand, six hundred twenty".