348157221 has 16 divisors (see below), whose sum is σ = 472657536. Its totient is φ = 227909376.

The previous prime is 348157219. The next prime is 348157237. The reversal of 348157221 is 122751843.

It is not a de Polignac number, because 348157221 - 2¹ = 348157219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (348157261) 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, 47616 + ... + 54438.

It is an arithmetic number, because the mean of its divisors is an integer number (29541096).

Almost surely, 2^348157221 is an apocalyptic number.

It is an amenable number.

348157221 is a deficient number, since it is larger than the sum of its proper divisors (124500315).

348157221 is a wasteful number, since it uses less digits than its factorization.

348157221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7132.

The product of its digits is 13440, while the sum is 33.

The square root of 348157221 is about 18658.9715954551. The cubic root of 348157221 is about 703.4908757895.

The spelling of 348157221 in words is "three hundred forty-eight million, one hundred fifty-seven thousand, two hundred twenty-one".