15202042987 has 4 divisors (see below), whose sum is σ = 15228760680. Its totient is φ = 15175325296.

The previous prime is 15202042979. The next prime is 15202043009. The reversal of 15202042987 is 78924020251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78924020251 = 2797 ⋅28217383.

It is a cyclic number.

It is not a de Polignac number, because 15202042987 - 2³ = 15202042979 is a prime.

It is a super-2 number, since 2×15202042987² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15202042907) 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, 13357993 + ... + 13359130.

It is an arithmetic number, because the mean of its divisors is an integer number (3807190170).

Almost surely, 2^15202042987 is an apocalyptic number.

15202042987 is a deficient number, since it is larger than the sum of its proper divisors (26717693).

15202042987 is an equidigital number, since it uses as much as digits as its factorization.

15202042987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26717692.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 15202042987 in words is "fifteen billion, two hundred two million, forty-two thousand, nine hundred eighty-seven".