145231520 has 48 divisors (see below), whose sum is σ = 392128128. Its totient is φ = 49793280.

The previous prime is 145231487. The next prime is 145231531. The reversal of 145231520 is 25132541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63716 + ... + 65955.

It is an arithmetic number, because the mean of its divisors is an integer number (8169336).

Almost surely, 2^145231520 is an apocalyptic number.

145231520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145231520 is an abundant number, since it is smaller than the sum of its proper divisors (246896608).

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

145231520 is a wasteful number, since it uses less digits than its factorization.

145231520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129693 (or 129685 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 145231520 is about 12051.2040892186. The cubic root of 145231520 is about 525.6382502104.

The spelling of 145231520 in words is "one hundred forty-five million, two hundred thirty-one thousand, five hundred twenty".