15400055 has 8 divisors (see below), whose sum is σ = 20160144. Its totient is φ = 11200000.

The previous prime is 15400043. The next prime is 15400057. The reversal of 15400055 is 55000451.

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

It is not a de Polignac number, because 15400055 - 2⁴ = 15400039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15400057) 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, 139946 + ... + 140055.

It is an arithmetic number, because the mean of its divisors is an integer number (2520018).

Almost surely, 2^15400055 is an apocalyptic number.

15400055 is a deficient number, since it is larger than the sum of its proper divisors (4760089).

15400055 is a wasteful number, since it uses less digits than its factorization.

15400055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280017.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 15400055 is about 3924.2903817123. The cubic root of 15400055 is about 248.7944896561.

The spelling of 15400055 in words is "fifteen million, four hundred thousand, fifty-five".