47161257 has 32 divisors (see below), whose sum is σ = 75479040. Its totient is φ = 25811520.

The previous prime is 47161241. The next prime is 47161271. The reversal of 47161257 is 75216174.

It is not a de Polignac number, because 47161257 - 2⁴ = 47161241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (47161207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18994 + ... + 21332.

It is an arithmetic number, because the mean of its divisors is an integer number (2358720).

Almost surely, 2^47161257 is an apocalyptic number.

47161257 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

47161257 is a deficient number, since it is larger than the sum of its proper divisors (28317783).

47161257 is a wasteful number, since it uses less digits than its factorization.

47161257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413.

The product of its digits is 11760, while the sum is 33.

The square root of 47161257 is about 6867.4054052459. The cubic root of 47161257 is about 361.2948662960.

The spelling of 47161257 in words is "forty-seven million, one hundred sixty-one thousand, two hundred fifty-seven".