147221790 has 32 divisors (see below), whose sum is σ = 364732416. Its totient is φ = 37992480.

The previous prime is 147221783. The next prime is 147221797. The reversal of 147221790 is 97122741.

147221790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (147221783) and next prime (147221797).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147221797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78222 + ... + 80081.

It is an arithmetic number, because the mean of its divisors is an integer number (11397888).

Almost surely, 2^147221790 is an apocalyptic number.

147221790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

147221790 is an abundant number, since it is smaller than the sum of its proper divisors (217510626).

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

147221790 is a wasteful number, since it uses less digits than its factorization.

147221790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158344.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 147221790 is about 12133.4986710347. The cubic root of 147221790 is about 528.0285008146.

The spelling of 147221790 in words is "one hundred forty-seven million, two hundred twenty-one thousand, seven hundred ninety".