145631322 has 12 divisors (see below), whose sum is σ = 315534570. Its totient is φ = 48543768.

The previous prime is 145631287. The next prime is 145631327. The reversal of 145631322 is 223136541.

145631322 is a `hidden beast` number, since 1 + 4 + 5 + 631 + 3 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 142778601 + 2852721 = 11949^2 + 1689^2 .

It is not an unprimeable number, because it can be changed into a prime (145631327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4045297 + ... + 4045332.

Almost surely, 2^145631322 is an apocalyptic number.

145631322 is an abundant number, since it is smaller than the sum of its proper divisors (169903248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145631322 is a wasteful number, since it uses less digits than its factorization.

145631322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8090637 (or 8090634 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 145631322 is about 12067.7803261412. The cubic root of 145631322 is about 526.1201444052.

Adding to 145631322 its reverse (223136541), we get a palindrome (368767863).

The spelling of 145631322 in words is "one hundred forty-five million, six hundred thirty-one thousand, three hundred twenty-two".