155318890 has 32 divisors (see below), whose sum is σ = 284881536. Its totient is φ = 60957120.

The previous prime is 155318887. The next prime is 155318899. The reversal of 155318890 is 98813551.

155318890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (155318899) 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, 200544 + ... + 201316.

It is an arithmetic number, because the mean of its divisors is an integer number (8902548).

Almost surely, 2^155318890 is an apocalyptic number.

155318890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155318890 is a deficient number, since it is larger than the sum of its proper divisors (129562646).

155318890 is a wasteful number, since it uses less digits than its factorization.

155318890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134.

The product of its (nonzero) digits is 43200, while the sum is 40.

The square root of 155318890 is about 12462.6999482456. The cubic root of 155318890 is about 537.5366652472.

The spelling of 155318890 in words is "one hundred fifty-five million, three hundred eighteen thousand, eight hundred ninety".