155155515 has 32 divisors (see below), whose sum is σ = 264098880. Its totient is φ = 77512704.

The previous prime is 155155499. The next prime is 155155531. The reversal of 155155515 is 515551551.

It is an interprime number because it is at equal distance from previous prime (155155499) and next prime (155155531).

It is not a de Polignac number, because 155155515 - 2⁴ = 155155499 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57067 + ... + 59723.

It is an arithmetic number, because the mean of its divisors is an integer number (8253090).

Almost surely, 2^155155515 is an apocalyptic number.

155155515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155155515 is a deficient number, since it is larger than the sum of its proper divisors (108943365).

155155515 is a wasteful number, since it uses less digits than its factorization.

155155515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911.

The product of its digits is 15625, while the sum is 33.

The square root of 155155515 is about 12456.1436648748. The cubic root of 155155515 is about 537.3481265524.

The spelling of 155155515 in words is "one hundred fifty-five million, one hundred fifty-five thousand, five hundred fifteen".