145427538631 has 4 divisors (see below), whose sum is σ = 145467793432. Its totient is φ = 145387283832.

The previous prime is 145427538623. The next prime is 145427538637. The reversal of 145427538631 is 136835724541.

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 145427538631 - 2³ = 145427538623 is a prime.

It is a super-2 number, since 2×145427538631² (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 (145427538637) 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, 20121981 + ... + 20129206.

It is an arithmetic number, because the mean of its divisors is an integer number (36366948358).

Almost surely, 2^145427538631 is an apocalyptic number.

145427538631 is a deficient number, since it is larger than the sum of its proper divisors (40254801).

145427538631 is an equidigital number, since it uses as much as digits as its factorization.

145427538631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40254800.

The product of its digits is 2419200, while the sum is 49.

The spelling of 145427538631 in words is "one hundred forty-five billion, four hundred twenty-seven million, five hundred thirty-eight thousand, six hundred thirty-one".