145231530 has 16 divisors (see below), whose sum is σ = 348555744. Its totient is φ = 38728400.

The previous prime is 145231487. The next prime is 145231531. The reversal of 145231530 is 35132541.

It is a super-2 number, since 2×145231530² = 42184394612281800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145231530.

It is not an unprimeable number, because it can be changed into a prime (145231531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2420496 + ... + 2420555.

It is an arithmetic number, because the mean of its divisors is an integer number (21784734).

Almost surely, 2^145231530 is an apocalyptic number.

145231530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145231530 is an abundant number, since it is smaller than the sum of its proper divisors (203324214).

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

145231530 is a wasteful number, since it uses less digits than its factorization.

145231530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841061.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 145231530 is about 12051.2045041149. The cubic root of 145231530 is about 525.6382622748.

The spelling of 145231530 in words is "one hundred forty-five million, two hundred thirty-one thousand, five hundred thirty".