145255232421 has 32 divisors (see below), whose sum is σ = 231944800640. Its totient is φ = 89311248000.

The previous prime is 145255232411. The next prime is 145255232627. The reversal of 145255232421 is 124232552541.

145255232421 is a `hidden beast` number, since 1 + 4 + 52 + 552 + 32 + 4 + 21 = 666.

It is not a de Polignac number, because 145255232421 - 2⁶ = 145255232357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145255232411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 234321 + ... + 587721.

It is an arithmetic number, because the mean of its divisors is an integer number (7248275020).

Almost surely, 2^145255232421 is an apocalyptic number.

It is an amenable number.

145255232421 is a deficient number, since it is larger than the sum of its proper divisors (86689568219).

145255232421 is a wasteful number, since it uses less digits than its factorization.

145255232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354594 (or 354588 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 145255232421 its reverse (124232552541), we get a palindrome (269487784962).

The spelling of 145255232421 in words is "one hundred forty-five billion, two hundred fifty-five million, two hundred thirty-two thousand, four hundred twenty-one".