149999220 has 72 divisors (see below), whose sum is σ = 520001664. Its totient is φ = 34285248.

The previous prime is 149999207. The next prime is 149999249. The reversal of 149999220 is 22999941.

149999220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58264 + ... + 60783.

Almost surely, 2^149999220 is an apocalyptic number.

149999220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149999220 is an abundant number, since it is smaller than the sum of its proper divisors (370002444).

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

149999220 is a wasteful number, since it uses less digits than its factorization.

149999220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119069 (or 119064 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 149999220 is about 12247.4168705078. The cubic root of 149999220 is about 531.3283636189.

The spelling of 149999220 in words is "one hundred forty-nine million, nine hundred ninety-nine thousand, two hundred twenty".