15231320450 has 12 divisors (see below), whose sum is σ = 28330256130. Its totient is φ = 6092528160.

The previous prime is 15231320449. The next prime is 15231320473. The reversal of 15231320450 is 5402313251.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6390243721 + 8841076729 = 79939^2 + 94027^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152313155 + ... + 152313254.

Almost surely, 2^15231320450 is an apocalyptic number.

15231320450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15231320450 is a deficient number, since it is larger than the sum of its proper divisors (13098935680).

15231320450 is a wasteful number, since it uses less digits than its factorization.

15231320450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304626421 (or 304626416 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 15231320450 in words is "fifteen billion, two hundred thirty-one million, three hundred twenty thousand, four hundred fifty".