155481918 has 32 divisors (see below), whose sum is σ = 320702976. Its totient is φ = 50215968.

The previous prime is 155481877. The next prime is 155481919. The reversal of 155481918 is 819184551.

155481918 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

155481918 is a modest number, since divided by 81918 gives 1554 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 155481918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155481919) 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, 57055 + ... + 59717.

It is an arithmetic number, because the mean of its divisors is an integer number (10021968).

Almost surely, 2^155481918 is an apocalyptic number.

155481918 is an abundant number, since it is smaller than the sum of its proper divisors (165221058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155481918 is a wasteful number, since it uses less digits than its factorization.

155481918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968.

The product of its digits is 57600, while the sum is 42.

The square root of 155481918 is about 12469.2388701155. The cubic root of 155481918 is about 537.7246717506.

The spelling of 155481918 in words is "one hundred fifty-five million, four hundred eighty-one thousand, nine hundred eighteen".