57198047 has 4 divisors (see below), whose sum is σ = 60562656. Its totient is φ = 53833440.

The previous prime is 57198023. The next prime is 57198049. The reversal of 57198047 is 74089175.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57198047 is a prime.

It is a super-2 number, since 2×57198047² = 6543233161228418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57197995 and 57198013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57198049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1682279 + ... + 1682312.

It is an arithmetic number, because the mean of its divisors is an integer number (15140664).

Almost surely, 2^57198047 is an apocalyptic number.

57198047 is a deficient number, since it is larger than the sum of its proper divisors (3364609).

57198047 is a wasteful number, since it uses less digits than its factorization.

57198047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364608.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 57198047 is about 7562.9390451067. The cubic root of 57198047 is about 385.2953195985.

The spelling of 57198047 in words is "fifty-seven million, one hundred ninety-eight thousand, forty-seven".