49158531 has 6 divisors (see below), whose sum is σ = 71006780. Its totient is φ = 32772348.

The previous prime is 49158523. The next prime is 49158539. The reversal of 49158531 is 13585194.

49158531 is a `hidden beast` number, since 49 + 1 + 585 + 31 = 666.

49158531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (49158523) and next prime (49158539).

It is not a de Polignac number, because 49158531 - 2³ = 49158523 is a prime.

It is a super-2 number, since 2×49158531² = 4833122340155922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49158539) 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 5 ways as a sum of consecutive naturals, for example, 2731021 + ... + 2731038.

Almost surely, 2^49158531 is an apocalyptic number.

49158531 is a deficient number, since it is larger than the sum of its proper divisors (21848249).

49158531 is a wasteful number, since it uses less digits than its factorization.

49158531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5462065 (or 5462062 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 49158531 is about 7011.3144987228. The cubic root of 49158531 is about 366.3247811362.

The spelling of 49158531 in words is "forty-nine million, one hundred fifty-eight thousand, five hundred thirty-one".