15400542313215 has 80 divisors (see below), whose sum is σ = 28350108103680. Its totient is φ = 7995431021760.

The previous prime is 15400542313207. The next prime is 15400542313241. The reversal of 15400542313215 is 51231324500451.

15400542313215 is a `hidden beast` number, since 1 + 5 + 4 + 0 + 0 + 5 + 423 + 13 + 215 = 666.

It is not a de Polignac number, because 15400542313215 - 2³ = 15400542313207 is a prime.

It is a super-2 number, since 2×15400542313215² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15400542313215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1118089 + ... + 5661378.

It is an arithmetic number, because the mean of its divisors is an integer number (354376351296).

Almost surely, 2^{15400542313215} is an apocalyptic number.

15400542313215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15400542313215 is a deficient number, since it is larger than the sum of its proper divisors (12949565790465).

15400542313215 is an equidigital number, since it uses as much as digits as its factorization.

15400542313215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779634 (or 6779625 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 15400542313215 its reverse (51231324500451), we get a palindrome (66631866813666).

The spelling of 15400542313215 in words is "fifteen trillion, four hundred billion, five hundred forty-two million, three hundred thirteen thousand, two hundred fifteen".