155415099 has 8 divisors (see below), whose sum is σ = 236823040. Its totient is φ = 88808616.

The previous prime is 155415077. The next prime is 155415103. The reversal of 155415099 is 990514551.

155415099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155415099 - 2¹⁶ = 155349563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155411099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3700339 + ... + 3700380.

It is an arithmetic number, because the mean of its divisors is an integer number (29602880).

Almost surely, 2^155415099 is an apocalyptic number.

155415099 is a deficient number, since it is larger than the sum of its proper divisors (81407941).

155415099 is an equidigital number, since it uses as much as digits as its factorization.

155415099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400729.

The product of its (nonzero) digits is 40500, while the sum is 39.

The square root of 155415099 is about 12466.5592285923. The cubic root of 155415099 is about 537.6476309097.

It can be divided in two parts, 1554 and 15099, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 155415099 in words is "one hundred fifty-five million, four hundred fifteen thousand, ninety-nine".