145396431 has 8 divisors (see below), whose sum is σ = 215402160. Its totient is φ = 96930936.

The previous prime is 145396423. The next prime is 145396457. The reversal of 145396431 is 134693541.

145396431 is a `hidden beast` number, since 1 + 4 + 5 + 3 + 9 + 643 + 1 = 666.

145396431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145396431 - 2³ = 145396423 is a prime.

It is a super-2 number, since 2×145396431² = 42280244295075522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145396411) 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, 2692500 + ... + 2692553.

It is an arithmetic number, because the mean of its divisors is an integer number (26925270).

Almost surely, 2^145396431 is an apocalyptic number.

145396431 is a deficient number, since it is larger than the sum of its proper divisors (70005729).

145396431 is an equidigital number, since it uses as much as digits as its factorization.

145396431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5385062 (or 5385056 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 145396431 is about 12058.0442444038. The cubic root of 145396431 is about 525.8371297657.

The spelling of 145396431 in words is "one hundred forty-five million, three hundred ninety-six thousand, four hundred thirty-one".