145520431320 has 64 divisors (see below), whose sum is σ = 476248688640. Its totient is φ = 35277680000.

The previous prime is 145520431319. The next prime is 145520431321. The reversal of 145520431320 is 23134025541.

It is an interprime number because it is at equal distance from previous prime (145520431319) and next prime (145520431321).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145520431321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55120056 + ... + 55122695.

It is an arithmetic number, because the mean of its divisors is an integer number (7441385760).

Almost surely, 2^145520431320 is an apocalyptic number.

145520431320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145520431320 is an abundant number, since it is smaller than the sum of its proper divisors (330728257320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145520431320 is a wasteful number, since it uses less digits than its factorization.

145520431320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110242776 (or 110242772 counting only the distinct ones).

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

Adding to 145520431320 its reverse (23134025541), we get a palindrome (168654456861).

The spelling of 145520431320 in words is "one hundred forty-five billion, five hundred twenty million, four hundred thirty-one thousand, three hundred twenty".