15131213450 has 12 divisors (see below), whose sum is σ = 28144057110. Its totient is φ = 6052485360.

The previous prime is 15131213441. The next prime is 15131213459. The reversal of 15131213450 is 5431213151.

It is an interprime number because it is at equal distance from previous prime (15131213441) and next prime (15131213459).

It can be written as a sum of positive squares in 3 ways, for example, as 13990868089 + 1140345361 = 118283^2 + 33769^2 .

It is not an unprimeable number, because it can be changed into a prime (15131213459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151312085 + ... + 151312184.

Almost surely, 2^15131213450 is an apocalyptic number.

15131213450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15131213450 is a deficient number, since it is larger than the sum of its proper divisors (13012843660).

15131213450 is a wasteful number, since it uses less digits than its factorization.

15131213450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302624281 (or 302624276 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 15131213450 in words is "fifteen billion, one hundred thirty-one million, two hundred thirteen thousand, four hundred fifty".