346726221 has 4 divisors (see below), whose sum is σ = 462301632. Its totient is φ = 231150812.

The previous prime is 346726213. The next prime is 346726241. The reversal of 346726221 is 122627643.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122627643 = 3 ⋅40875881.

It is a cyclic number.

It is not a de Polignac number, because 346726221 - 2³ = 346726213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (346726241) 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, 57787701 + ... + 57787706.

It is an arithmetic number, because the mean of its divisors is an integer number (115575408).

Almost surely, 2^346726221 is an apocalyptic number.

It is an amenable number.

346726221 is a deficient number, since it is larger than the sum of its proper divisors (115575411).

346726221 is a wasteful number, since it uses less digits than its factorization.

346726221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115575410.

The product of its digits is 24192, while the sum is 33.

The square root of 346726221 is about 18620.5859467418. The cubic root of 346726221 is about 702.5257200261.

The spelling of 346726221 in words is "three hundred forty-six million, seven hundred twenty-six thousand, two hundred twenty-one".