15202139 has 2 divisors, whose sum is σ = 15202140. Its totient is φ = 15202138.

The previous prime is 15202123. The next prime is 15202141. The reversal of 15202139 is 93120251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15202139 - 2⁴ = 15202123 is a prime.

It is a super-2 number, since 2×15202139² = 462210060350642, which contains 22 as substring.

Together with 15202141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15202639) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7601069 + 7601070.

It is an arithmetic number, because the mean of its divisors is an integer number (7601070).

Almost surely, 2^15202139 is an apocalyptic number.

15202139 is a deficient number, since it is larger than the sum of its proper divisors (1).

15202139 is an equidigital number, since it uses as much as digits as its factorization.

15202139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 15202139 is about 3898.9920492353. The cubic root of 15202139 is about 247.7240850513.

The spelling of 15202139 in words is "fifteen million, two hundred two thousand, one hundred thirty-nine".