145354431 has 4 divisors (see below), whose sum is σ = 193805912. Its totient is φ = 96902952.

The previous prime is 145354379. The next prime is 145354439. The reversal of 145354431 is 134453541.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 145354431 - 2⁶ = 145354367 is a prime.

It is a super-2 number, since 2×145354431² = 42255821222667522, 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 (145354439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24225736 + ... + 24225741.

It is an arithmetic number, because the mean of its divisors is an integer number (48451478).

Almost surely, 2^145354431 is an apocalyptic number.

145354431 is a deficient number, since it is larger than the sum of its proper divisors (48451481).

145354431 is an equidigital number, since it uses as much as digits as its factorization.

145354431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48451480.

The product of its digits is 14400, while the sum is 30.

The square root of 145354431 is about 12056.3025426538. The cubic root of 145354431 is about 525.7864928365.

The spelling of 145354431 in words is "one hundred forty-five million, three hundred fifty-four thousand, four hundred thirty-one".