155230515 has 24 divisors (see below), whose sum is σ = 293527728. Its totient is φ = 75263040.

The previous prime is 155230511. The next prime is 155230529. The reversal of 155230515 is 515032551.

It is not a de Polignac number, because 155230515 - 2² = 155230511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155230511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156304 + ... + 157293.

It is an arithmetic number, because the mean of its divisors is an integer number (12230322).

Almost surely, 2^155230515 is an apocalyptic number.

155230515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155230515 is a deficient number, since it is larger than the sum of its proper divisors (138297213).

155230515 is a wasteful number, since it uses less digits than its factorization.

155230515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313619 (or 313616 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 155230515 is about 12459.1538637261. The cubic root of 155230515 is about 537.4346947881.

The spelling of 155230515 in words is "one hundred fifty-five million, two hundred thirty thousand, five hundred fifteen".