145520312 has 16 divisors (see below), whose sum is σ = 311829360. Its totient is φ = 62365824.

The previous prime is 145520303. The next prime is 145520327. The reversal of 145520312 is 213025541.

145520312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145520312² = 42352322409154688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299233 + ... + 1299344.

It is an arithmetic number, because the mean of its divisors is an integer number (19489335).

Almost surely, 2^145520312 is an apocalyptic number.

It is an amenable number.

145520312 is an abundant number, since it is smaller than the sum of its proper divisors (166309048).

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

145520312 is a wasteful number, since it uses less digits than its factorization.

145520312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598590 (or 2598586 counting only the distinct ones).

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

The square root of 145520312 is about 12063.1800119206. The cubic root of 145520312 is about 525.9864290233.

Adding to 145520312 its reverse (213025541), we get a palindrome (358545853).

The spelling of 145520312 in words is "one hundred forty-five million, five hundred twenty thousand, three hundred twelve".