155253515 has 4 divisors (see below), whose sum is σ = 186304224. Its totient is φ = 124202808.

The previous prime is 155253509. The next prime is 155253523. The reversal of 155253515 is 515352551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155253515 - 2¹⁶ = 155187979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15525347 + ... + 15525356.

It is an arithmetic number, because the mean of its divisors is an integer number (46576056).

Almost surely, 2^155253515 is an apocalyptic number.

155253515 is a deficient number, since it is larger than the sum of its proper divisors (31050709).

155253515 is an equidigital number, since it uses as much as digits as its factorization.

155253515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31050708.

The product of its digits is 18750, while the sum is 32.

The square root of 155253515 is about 12460.0768456699. The cubic root of 155253515 is about 537.4612367935.

The spelling of 155253515 in words is "one hundred fifty-five million, two hundred fifty-three thousand, five hundred fifteen".