145556431 has 8 divisors (see below), whose sum is σ = 156646224. Its totient is φ = 134747520.

The previous prime is 145556429. The next prime is 145556441. The reversal of 145556431 is 134655541.

145556431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145556431 - 2¹ = 145556429 is a prime.

It is a super-2 number, since 2×145556431² = 42373349210915522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145556441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69145 + ... + 71218.

It is an arithmetic number, because the mean of its divisors is an integer number (19580778).

Almost surely, 2^145556431 is an apocalyptic number.

145556431 is a deficient number, since it is larger than the sum of its proper divisors (11089793).

145556431 is a wasteful number, since it uses less digits than its factorization.

145556431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140441.

The product of its digits is 36000, while the sum is 34.

The square root of 145556431 is about 12064.6769952618. The cubic root of 145556431 is about 526.0299430684.

The spelling of 145556431 in words is "one hundred forty-five million, five hundred fifty-six thousand, four hundred thirty-one".