145251431 has 8 divisors (see below), whose sum is σ = 158989824. Its totient is φ = 131879520.

The previous prime is 145251427. The next prime is 145251439. The reversal of 145251431 is 134152541.

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 145251431 - 2² = 145251427 is a prime.

It is a super-2 number, since 2×145251431² = 42195956415095522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145251431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145251439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90791 + ... + 92376.

It is an arithmetic number, because the mean of its divisors is an integer number (19873728).

Almost surely, 2^145251431 is an apocalyptic number.

145251431 is a deficient number, since it is larger than the sum of its proper divisors (13738393).

145251431 is a wasteful number, since it uses less digits than its factorization.

145251431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183241.

The product of its digits is 2400, while the sum is 26.

The square root of 145251431 is about 12052.0301609314. The cubic root of 145251431 is about 525.6622704896.

The spelling of 145251431 in words is "one hundred forty-five million, two hundred fifty-one thousand, four hundred thirty-one".