148715221 has 4 divisors (see below), whose sum is σ = 148752352. Its totient is φ = 148678092.

The previous prime is 148715213. The next prime is 148715227. The reversal of 148715221 is 122517841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 148715221 - 2³ = 148715213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148715227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11715 + ... + 20848.

It is an arithmetic number, because the mean of its divisors is an integer number (37188088).

Almost surely, 2^148715221 is an apocalyptic number.

It is an amenable number.

148715221 is a deficient number, since it is larger than the sum of its proper divisors (37131).

148715221 is an equidigital number, since it uses as much as digits as its factorization.

148715221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37130.

The product of its digits is 4480, while the sum is 31.

The square root of 148715221 is about 12194.8850343084. The cubic root of 148715221 is about 529.8079534412.

The spelling of 148715221 in words is "one hundred forty-eight million, seven hundred fifteen thousand, two hundred twenty-one".