145123631 has 2 divisors, whose sum is σ = 145123632. Its totient is φ = 145123630.

The previous prime is 145123619. The next prime is 145123651. The reversal of 145123631 is 136321541.

145123631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145123631 - 2²⁶ = 78014767 is a prime.

It is a super-2 number, since 2×145123631² = 42121736549248322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145123631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145123651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72561815 + 72561816.

It is an arithmetic number, because the mean of its divisors is an integer number (72561816).

Almost surely, 2^145123631 is an apocalyptic number.

145123631 is a deficient number, since it is larger than the sum of its proper divisors (1).

145123631 is an equidigital number, since it uses as much as digits as its factorization.

145123631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 145123631 is about 12046.7269828780. The cubic root of 145123631 is about 525.5080566318.

The spelling of 145123631 in words is "one hundred forty-five million, one hundred twenty-three thousand, six hundred thirty-one".