145225631 has 2 divisors, whose sum is σ = 145225632. Its totient is φ = 145225630.

The previous prime is 145225627. The next prime is 145225637. The reversal of 145225631 is 136522541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145225631 - 2² = 145225627 is a prime.

It is a super-2 number, since 2×145225631² = 42180967798696322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 145225594 and 145225603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145225637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72612815 + 72612816.

It is an arithmetic number, because the mean of its divisors is an integer number (72612816).

Almost surely, 2^145225631 is an apocalyptic number.

145225631 is a deficient number, since it is larger than the sum of its proper divisors (1).

145225631 is an equidigital number, since it uses as much as digits as its factorization.

145225631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 145225631 is about 12050.9597543100. The cubic root of 145225631 is about 525.6311454040.

The spelling of 145225631 in words is "one hundred forty-five million, two hundred twenty-five thousand, six hundred thirty-one".