145235232224521 has 2 divisors, whose sum is σ = 145235232224522. Its totient is φ = 145235232224520.

The previous prime is 145235232224501. The next prime is 145235232224587. The reversal of 145235232224521 is 125422232532541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145234771692921 + 460531600 = 12051339^2 + 21460^2 .

It is a cyclic number.

It is not a de Polignac number, because 145235232224521 - 2¹³ = 145235232216329 is a prime.

It is not a weakly prime, because it can be changed into another prime (145235232224501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72617616112260 + 72617616112261.

It is an arithmetic number, because the mean of its divisors is an integer number (72617616112261).

Almost surely, 2^{145235232224521} is an apocalyptic number.

It is an amenable number.

145235232224521 is a deficient number, since it is larger than the sum of its proper divisors (1).

145235232224521 is an equidigital number, since it uses as much as digits as its factorization.

145235232224521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152000, while the sum is 43.

The spelling of 145235232224521 in words is "one hundred forty-five trillion, two hundred thirty-five billion, two hundred thirty-two million, two hundred twenty-four thousand, five hundred twenty-one".