145151220 has 24 divisors (see below), whose sum is σ = 406423584. Its totient is φ = 38706976.

The previous prime is 145151191. The next prime is 145151231. The reversal of 145151220 is 22151541.

145151220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1209534 + ... + 1209653.

It is an arithmetic number, because the mean of its divisors is an integer number (16934316).

Almost surely, 2^145151220 is an apocalyptic number.

145151220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145151220 is an abundant number, since it is smaller than the sum of its proper divisors (261272364).

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

145151220 is a wasteful number, since it uses less digits than its factorization.

145151220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419199 (or 2419197 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 145151220 is about 12047.8720112724. The cubic root of 145151220 is about 525.5413554200.

The spelling of 145151220 in words is "one hundred forty-five million, one hundred fifty-one thousand, two hundred twenty".