15252421145431 has 4 divisors (see below), whose sum is σ = 15778366702200. Its totient is φ = 14726475588664.

The previous prime is 15252421145413. The next prime is 15252421145453. The reversal of 15252421145431 is 13454112425251.

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

It is a cyclic number.

It is not a de Polignac number, because 15252421145431 - 2³¹ = 15250273661783 is a prime.

It is a super-2 number, since 2×15252421145431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15252421145231) 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, 262972778341 + ... + 262972778398.

It is an arithmetic number, because the mean of its divisors is an integer number (3944591675550).

Almost surely, 2^{15252421145431} is an apocalyptic number.

15252421145431 is a deficient number, since it is larger than the sum of its proper divisors (525945556769).

15252421145431 is an equidigital number, since it uses as much as digits as its factorization.

15252421145431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525945556768.

The product of its digits is 192000, while the sum is 40.

The spelling of 15252421145431 in words is "fifteen trillion, two hundred fifty-two billion, four hundred twenty-one million, one hundred forty-five thousand, four hundred thirty-one".