145122312044531 has 4 divisors (see below), whose sum is σ = 145123404480600. Its totient is φ = 145121219608464.

The previous prime is 145122312044519. The next prime is 145122312044539. The reversal of 145122312044531 is 135440213221541.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145122312044531 is a prime.

It is a super-2 number, since 2×145122312044531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145122312044539) 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, 546018746 + ... + 546284463.

It is an arithmetic number, because the mean of its divisors is an integer number (36280851120150).

Almost surely, 2^{145122312044531} is an apocalyptic number.

145122312044531 is a deficient number, since it is larger than the sum of its proper divisors (1092436069).

145122312044531 is a wasteful number, since it uses less digits than its factorization.

145122312044531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092436068.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 145122312044531 in words is "one hundred forty-five trillion, one hundred twenty-two billion, three hundred twelve million, forty-four thousand, five hundred thirty-one".