145431322591 has 2 divisors, whose sum is σ = 145431322592. Its totient is φ = 145431322590.

The previous prime is 145431322523. The next prime is 145431322613. The reversal of 145431322591 is 195223134541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145431322591 - 2²³ = 145422933983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145431322691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72715661295 + 72715661296.

It is an arithmetic number, because the mean of its divisors is an integer number (72715661296).

Almost surely, 2^145431322591 is an apocalyptic number.

145431322591 is a deficient number, since it is larger than the sum of its proper divisors (1).

145431322591 is an equidigital number, since it uses as much as digits as its factorization.

145431322591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The spelling of 145431322591 in words is "one hundred forty-five billion, four hundred thirty-one million, three hundred twenty-two thousand, five hundred ninety-one".