15402155 has 4 divisors (see below), whose sum is σ = 18482592. Its totient is φ = 12321720.

The previous prime is 15402143. The next prime is 15402193. The reversal of 15402155 is 55120451.

It is a happy number.

15402155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 15402155 - 2⁶ = 15402091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15402155.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540211 + ... + 1540220.

It is an arithmetic number, because the mean of its divisors is an integer number (4620648).

Almost surely, 2^15402155 is an apocalyptic number.

15402155 is a deficient number, since it is larger than the sum of its proper divisors (3080437).

15402155 is an equidigital number, since it uses as much as digits as its factorization.

15402155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080436.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 15402155 is about 3924.5579368892. The cubic root of 15402155 is about 248.8057979422.

The spelling of 15402155 in words is "fifteen million, four hundred two thousand, one hundred fifty-five".