145121013831 has 24 divisors (see below), whose sum is σ = 207740201200. Its totient is φ = 90039793536.

The previous prime is 145121013823. The next prime is 145121013833. The reversal of 145121013831 is 138310121541.

It is not a de Polignac number, because 145121013831 - 2³ = 145121013823 is a prime.

It is a super-2 number, since 2×145121013831² (a number of 23 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 (145121013833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1177006 + ... + 1294443.

Almost surely, 2^145121013831 is an apocalyptic number.

145121013831 is a deficient number, since it is larger than the sum of its proper divisors (62619187369).

145121013831 is a wasteful number, since it uses less digits than its factorization.

145121013831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471535 (or 2471512 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The spelling of 145121013831 in words is "one hundred forty-five billion, one hundred twenty-one million, thirteen thousand, eight hundred thirty-one".