2145521426431 has 4 divisors (see below), whose sum is σ = 2145758065192. Its totient is φ = 2145284787672.

The previous prime is 2145521426429. The next prime is 2145521426467. The reversal of 2145521426431 is 1346241255412.

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 2145521426431 - 2¹ = 2145521426429 is a prime.

It is a super-2 number, since 2×2145521426431² (a number of 25 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 (2145521486431) 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, 118305780 + ... + 118323913.

It is an arithmetic number, because the mean of its divisors is an integer number (536439516298).

Almost surely, 2^{2145521426431} is an apocalyptic number.

2145521426431 is a deficient number, since it is larger than the sum of its proper divisors (236638761).

2145521426431 is an equidigital number, since it uses as much as digits as its factorization.

2145521426431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236638760.

The product of its digits is 230400, while the sum is 40.

The spelling of 2145521426431 in words is "two trillion, one hundred forty-five billion, five hundred twenty-one million, four hundred twenty-six thousand, four hundred thirty-one".