47157238 has 4 divisors (see below), whose sum is σ = 70735860. Its totient is φ = 23578618.

The previous prime is 47157191. The next prime is 47157247. The reversal of 47157238 is 83275174.

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

It is a junction number, because it is equal to n+sod(n) for n = 47157197 and 47157206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11789308 + ... + 11789311.

It is an arithmetic number, because the mean of its divisors is an integer number (17683965).

Almost surely, 2^47157238 is an apocalyptic number.

47157238 is a deficient number, since it is larger than the sum of its proper divisors (23578622).

47157238 is a wasteful number, since it uses less digits than its factorization.

47157238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23578621.

The product of its digits is 47040, while the sum is 37.

The square root of 47157238 is about 6867.1127848609. The cubic root of 47157238 is about 361.2846030319.

The spelling of 47157238 in words is "forty-seven million, one hundred fifty-seven thousand, two hundred thirty-eight".