49881555 has 32 divisors (see below), whose sum is σ = 93350400. Its totient is φ = 25202016.

The previous prime is 49881551. The next prime is 49881599. The reversal of 49881555 is 55518894.

It is a happy number.

49881555 is a `hidden beast` number, since 4 + 98 + 8 + 1 + 555 = 666.

It is not a de Polignac number, because 49881555 - 2² = 49881551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 49881555.

It is not an unprimeable number, because it can be changed into a prime (49881551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7159 + ... + 12288.

It is an arithmetic number, because the mean of its divisors is an integer number (2917200).

Almost surely, 2^49881555 is an apocalyptic number.

49881555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

49881555 is a deficient number, since it is larger than the sum of its proper divisors (43468845).

49881555 is a wasteful number, since it uses less digits than its factorization.

49881555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19480 (or 19474 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 49881555 is about 7062.6875196344. The cubic root of 49881555 is about 368.1120164470.

The spelling of 49881555 in words is "forty-nine million, eight hundred eighty-one thousand, five hundred fifty-five".