15532321349 has 4 divisors (see below), whose sum is σ = 15674819820. Its totient is φ = 15389822880.

The previous prime is 15532321327. The next prime is 15532321367. The reversal of 15532321349 is 94312323551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3621873124 + 11910448225 = 60182^2 + 109135^2 .

It is a cyclic number.

It is not a de Polignac number, because 15532321349 - 2¹² = 15532317253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15532321309) 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, 71249072 + ... + 71249289.

It is an arithmetic number, because the mean of its divisors is an integer number (3918704955).

Almost surely, 2^15532321349 is an apocalyptic number.

It is an amenable number.

15532321349 is a deficient number, since it is larger than the sum of its proper divisors (142498471).

15532321349 is a wasteful number, since it uses less digits than its factorization.

15532321349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142498470.

The product of its digits is 97200, while the sum is 38.

The spelling of 15532321349 in words is "fifteen billion, five hundred thirty-two million, three hundred twenty-one thousand, three hundred forty-nine".