145331590 has 16 divisors (see below), whose sum is σ = 261995472. Its totient is φ = 58044064.

The previous prime is 145331569. The next prime is 145331629. The reversal of 145331590 is 95133541.

It is a happy number.

It is a super-2 number, since 2×145331590² = 42242542103856200, which contains 22 as substring.

It is a congruent number.

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, 3964 + ... + 17503.

It is an arithmetic number, because the mean of its divisors is an integer number (16374717).

Almost surely, 2^145331590 is an apocalyptic number.

145331590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145331590 is a deficient number, since it is larger than the sum of its proper divisors (116663882).

145331590 is a wasteful number, since it uses less digits than its factorization.

145331590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22151.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 145331590 is about 12055.3552415514. The cubic root of 145331590 is about 525.7589506916.

The spelling of 145331590 in words is "one hundred forty-five million, three hundred thirty-one thousand, five hundred ninety".