15242731387 has 8 divisors (see below), whose sum is σ = 16498578096. Its totient is φ = 13998788832.

The previous prime is 15242731337. The next prime is 15242731397. The reversal of 15242731387 is 78313724251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15242731387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15242731337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2973373 + ... + 2978494.

It is an arithmetic number, because the mean of its divisors is an integer number (2062322262).

Almost surely, 2^15242731387 is an apocalyptic number.

15242731387 is a deficient number, since it is larger than the sum of its proper divisors (1255846709).

15242731387 is a wasteful number, since it uses less digits than its factorization.

15242731387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5952077.

The product of its digits is 282240, while the sum is 43.

The spelling of 15242731387 in words is "fifteen billion, two hundred forty-two million, seven hundred thirty-one thousand, three hundred eighty-seven".