49978131 has 16 divisors (see below), whose sum is σ = 76666368. Its totient is φ = 28368000.

The previous prime is 49978127. The next prime is 49978141. The reversal of 49978131 is 13187994.

It is a happy number.

It is not a de Polignac number, because 49978131 - 2² = 49978127 is a prime.

It is a super-2 number, since 2×49978131² = 4995627156506322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49978141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4710 + ... + 11051.

It is an arithmetic number, because the mean of its divisors is an integer number (4791648).

Almost surely, 2^49978131 is an apocalyptic number.

49978131 is a deficient number, since it is larger than the sum of its proper divisors (26688237).

49978131 is a wasteful number, since it uses less digits than its factorization.

49978131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15922.

The product of its digits is 54432, while the sum is 42.

The square root of 49978131 is about 7069.5212709207. The cubic root of 49978131 is about 368.3494313082.

The spelling of 49978131 in words is "forty-nine million, nine hundred seventy-eight thousand, one hundred thirty-one".