155072090 has 16 divisors (see below), whose sum is σ = 279351072. Its totient is φ = 61979664.

The previous prime is 155072083. The next prime is 155072101. The reversal of 155072090 is 90270551.

155072090 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8837 + ... + 19703.

It is an arithmetic number, because the mean of its divisors is an integer number (17459442).

Almost surely, 2^155072090 is an apocalyptic number.

155072090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155072090 is a deficient number, since it is larger than the sum of its proper divisors (124278982).

155072090 is a wasteful number, since it uses less digits than its factorization.

155072090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12301.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 155072090 is about 12452.7944655005. The cubic root of 155072090 is about 537.2518010380.

The spelling of 155072090 in words is "one hundred fifty-five million, seventy-two thousand, ninety".