15515052251423 has 4 divisors (see below), whose sum is σ = 15518662926480. Its totient is φ = 15511441576368.

The previous prime is 15515052251383. The next prime is 15515052251441. The reversal of 15515052251423 is 32415225051551.

15515052251423 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 a cyclic number.

It is not a de Polignac number, because 15515052251423 - 2²⁸ = 15514783815967 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 (15515052257423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805331083 + ... + 1805339676.

It is an arithmetic number, because the mean of its divisors is an integer number (3879665731620).

Almost surely, 2^{15515052251423} is an apocalyptic number.

15515052251423 is a deficient number, since it is larger than the sum of its proper divisors (3610675057).

15515052251423 is an equidigital number, since it uses as much as digits as its factorization.

15515052251423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610675056.

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 15515052251423 in words is "fifteen trillion, five hundred fifteen billion, fifty-two million, two hundred fifty-one thousand, four hundred twenty-three".