15532312241 has 4 divisors (see below), whose sum is σ = 15600736752. Its totient is φ = 15463887732.

The previous prime is 15532312219. The next prime is 15532312249. The reversal of 15532312241 is 14221323551.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15532312241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15532312249) 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, 34211915 + ... + 34212368.

It is an arithmetic number, because the mean of its divisors is an integer number (3900184188).

Almost surely, 2^15532312241 is an apocalyptic number.

It is an amenable number.

15532312241 is a deficient number, since it is larger than the sum of its proper divisors (68424511).

15532312241 is an equidigital number, since it uses as much as digits as its factorization.

15532312241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68424510.

The product of its digits is 7200, while the sum is 29.

Adding to 15532312241 its reverse (14221323551), we get a palindrome (29753635792).

The spelling of 15532312241 in words is "fifteen billion, five hundred thirty-two million, three hundred twelve thousand, two hundred forty-one".