15213015473887 has 32 divisors (see below), whose sum is σ = 19219276177920. Its totient is φ = 11697273262080.

The previous prime is 15213015473867. The next prime is 15213015473893. The reversal of 15213015473887 is 78837451031251.

It is a de Polignac number, because none of the positive numbers 2^k-15213015473887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15213015473807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 504937 + ... + 5539042.

It is an arithmetic number, because the mean of its divisors is an integer number (600602380560).

Almost surely, 2^{15213015473887} is an apocalyptic number.

15213015473887 is a deficient number, since it is larger than the sum of its proper divisors (4006260704033).

15213015473887 is a wasteful number, since it uses less digits than its factorization.

15213015473887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6044431.

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 15213015473887 in words is "fifteen trillion, two hundred thirteen billion, fifteen million, four hundred seventy-three thousand, eight hundred eighty-seven".