15400155 has 8 divisors (see below), whose sum is σ = 24640272. Its totient is φ = 8213408.

The previous prime is 15400111. The next prime is 15400159. The reversal of 15400155 is 55100451.

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

It is a cyclic number.

It is not a de Polignac number, because 15400155 - 2²³ = 7011547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15400159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513324 + ... + 513353.

It is an arithmetic number, because the mean of its divisors is an integer number (3080034).

Almost surely, 2^15400155 is an apocalyptic number.

15400155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15400155 is a deficient number, since it is larger than the sum of its proper divisors (9240117).

15400155 is a wasteful number, since it uses less digits than its factorization.

15400155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026685.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 15400155 is about 3924.3031228487. The cubic root of 15400155 is about 248.7950281692.

The spelling of 15400155 in words is "fifteen million, four hundred thousand, one hundred fifty-five".