57981157 has 8 divisors (see below), whose sum is σ = 63893984. Its totient is φ = 52275888.

The previous prime is 57981151. The next prime is 57981163. The reversal of 57981157 is 75118975.

It is an interprime number because it is at equal distance from previous prime (57981151) and next prime (57981163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57981157 - 2⁷ = 57981029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57981151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51303 + ... + 52420.

It is an arithmetic number, because the mean of its divisors is an integer number (7986748).

Almost surely, 2^57981157 is an apocalyptic number.

It is an amenable number.

57981157 is a deficient number, since it is larger than the sum of its proper divisors (5912827).

57981157 is a wasteful number, since it uses less digits than its factorization.

57981157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103779.

The product of its digits is 88200, while the sum is 43.

The square root of 57981157 is about 7614.5359018131. The cubic root of 57981157 is about 387.0457405980.

The spelling of 57981157 in words is "fifty-seven million, nine hundred eighty-one thousand, one hundred fifty-seven".