49912155 has 12 divisors (see below), whose sum is σ = 86514480. Its totient is φ = 26619792.

The previous prime is 49912147. The next prime is 49912157. The reversal of 49912155 is 55121994.

49912155 is a `hidden beast` number, since 499 + 12 + 155 = 666.

It is not a de Polignac number, because 49912155 - 2³ = 49912147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49912157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554535 + ... + 554624.

It is an arithmetic number, because the mean of its divisors is an integer number (7209540).

Almost surely, 2^49912155 is an apocalyptic number.

49912155 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

49912155 is a deficient number, since it is larger than the sum of its proper divisors (36602325).

49912155 is a wasteful number, since it uses less digits than its factorization.

49912155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109170 (or 1109167 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 49912155 is about 7064.8535016658. The cubic root of 49912155 is about 368.1872742260.

It can be divided in two parts, 4991215 and 5, that added together give a triangular number (4991220 = T₃₁₅₉).

The spelling of 49912155 in words is "forty-nine million, nine hundred twelve thousand, one hundred fifty-five".