57198961 has 4 divisors (see below), whose sum is σ = 57498624. Its totient is φ = 56899300.

The previous prime is 57198959. The next prime is 57198971. The reversal of 57198961 is 16989175.

It is a happy number.

57198961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57198961 - 2¹ = 57198959 is a prime.

It is a super-2 number, since 2×57198961² = 6543442278959042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57198971) 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 3 ways as a sum of consecutive naturals, for example, 149545 + ... + 149926.

It is an arithmetic number, because the mean of its divisors is an integer number (14374656).

Almost surely, 2^57198961 is an apocalyptic number.

It is an amenable number.

57198961 is a deficient number, since it is larger than the sum of its proper divisors (299663).

57198961 is a wasteful number, since it uses less digits than its factorization.

57198961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299662.

The product of its digits is 136080, while the sum is 46.

The square root of 57198961 is about 7562.9994711093. Note that the first 3 decimals coincide. The cubic root of 57198961 is about 385.2973718716.

The spelling of 57198961 in words is "fifty-seven million, one hundred ninety-eight thousand, nine hundred sixty-one".