15215215053 has 4 divisors (see below), whose sum is σ = 20286953408. Its totient is φ = 10143476700.

The previous prime is 15215215051. The next prime is 15215215069. The reversal of 15215215053 is 35051251251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35051251251 = 3 ⋅11683750417.

It is not a de Polignac number, because 15215215053 - 2¹ = 15215215051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15215215053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15215215051) 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, 2535869173 + ... + 2535869178.

It is an arithmetic number, because the mean of its divisors is an integer number (5071738352).

Almost surely, 2^15215215053 is an apocalyptic number.

It is an amenable number.

15215215053 is a deficient number, since it is larger than the sum of its proper divisors (5071738355).

15215215053 is an equidigital number, since it uses as much as digits as its factorization.

15215215053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071738354.

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 15215215053 in words is "fifteen billion, two hundred fifteen million, two hundred fifteen thousand, fifty-three".