155415090 has 32 divisors (see below), whose sum is σ = 385030656. Its totient is φ = 40106880.

The previous prime is 155415077. The next prime is 155415103. The reversal of 155415090 is 90514551.

It is an interprime number because it is at equal distance from previous prime (155415077) and next prime (155415103).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82627 + ... + 84486.

It is an arithmetic number, because the mean of its divisors is an integer number (12032208).

Almost surely, 2^155415090 is an apocalyptic number.

155415090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155415090 is an abundant number, since it is smaller than the sum of its proper divisors (229615566).

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

155415090 is a wasteful number, since it uses less digits than its factorization.

155415090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167154.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 155415090 is about 12466.5588676266. The cubic root of 155415090 is about 537.6476205314.

The spelling of 155415090 in words is "one hundred fifty-five million, four hundred fifteen thousand, ninety".