145131312152242 has 16 divisors (see below), whose sum is σ = 234443793832920. Its totient is φ = 66983423968512.

The previous prime is 145131312152207. The next prime is 145131312152261. The reversal of 145131312152242 is 242251213131541.

It can be written as a sum of positive squares in 4 ways, for example, as 86003347892401 + 59127964259841 = 9273799^2 + 7689471^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3823767 + ... + 17460922.

Almost surely, 2^{145131312152242} is an apocalyptic number.

145131312152242 is a deficient number, since it is larger than the sum of its proper divisors (89312481680678).

145131312152242 is a wasteful number, since it uses less digits than its factorization.

145131312152242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21546957.

The product of its digits is 57600, while the sum is 37.

Adding to 145131312152242 its reverse (242251213131541), we get a palindrome (387382525283783).

The spelling of 145131312152242 in words is "one hundred forty-five trillion, one hundred thirty-one billion, three hundred twelve million, one hundred fifty-two thousand, two hundred forty-two".