145636631 has 16 divisors (see below), whose sum is σ = 168595968. Its totient is φ = 123228000.

The previous prime is 145636609. The next prime is 145636639. The reversal of 145636631 is 136636541.

It is not a de Polignac number, because 145636631 - 2¹⁴ = 145620247 is a prime.

It is a super-2 number, since 2×145636631² = 42420056578060322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145636591 and 145636600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145636639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222701 + ... + 223353.

It is an arithmetic number, because the mean of its divisors is an integer number (10537248).

Almost surely, 2^145636631 is an apocalyptic number.

145636631 is a deficient number, since it is larger than the sum of its proper divisors (22959337).

145636631 is a wasteful number, since it uses less digits than its factorization.

145636631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022.

The product of its digits is 38880, while the sum is 35.

The square root of 145636631 is about 12068.0002900232. Note that the first 3 decimals coincide. The cubic root of 145636631 is about 526.1265375763.

The spelling of 145636631 in words is "one hundred forty-five million, six hundred thirty-six thousand, six hundred thirty-one".