155243615 has 12 divisors (see below), whose sum is σ = 188605704. Its totient is φ = 122671344.

The previous prime is 155243587. The next prime is 155243617. The reversal of 155243615 is 516342551.

It is not a de Polignac number, because 155243615 - 2⁶ = 155243551 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155243617) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 32192 + ... + 36698.

It is an arithmetic number, because the mean of its divisors is an integer number (15717142).

Almost surely, 2^155243615 is an apocalyptic number.

155243615 is a deficient number, since it is larger than the sum of its proper divisors (33362089).

155243615 is an frugal number, since it uses more digits than its factorization.

155243615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4678 (or 4595 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 155243615 is about 12459.6795705187. The cubic root of 155243615 is about 537.4498125125.

The spelling of 155243615 in words is "one hundred fifty-five million, two hundred forty-three thousand, six hundred fifteen".