345822521 has 4 divisors (see below), whose sum is σ = 377260944. Its totient is φ = 314384100.

The previous prime is 345822497. The next prime is 345822523. The reversal of 345822521 is 125228543.

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 a de Polignac number, because none of the positive numbers 2^k-345822521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345822523) 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, 15719195 + ... + 15719216.

It is an arithmetic number, because the mean of its divisors is an integer number (94315236).

Almost surely, 2^345822521 is an apocalyptic number.

It is an amenable number.

345822521 is a deficient number, since it is larger than the sum of its proper divisors (31438423).

345822521 is a wasteful number, since it uses less digits than its factorization.

345822521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31438422.

The product of its digits is 19200, while the sum is 32.

The square root of 345822521 is about 18596.3039607337. The cubic root of 345822521 is about 701.9148395219.

The spelling of 345822521 in words is "three hundred forty-five million, eight hundred twenty-two thousand, five hundred twenty-one".