345221651 has 16 divisors (see below), whose sum is σ = 367476480. Its totient is φ = 323637600.

The previous prime is 345221647. The next prime is 345221663. The reversal of 345221651 is 156122543.

It is not a de Polignac number, because 345221651 - 2² = 345221647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345221671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264701 + ... + 266001.

It is an arithmetic number, because the mean of its divisors is an integer number (22967280).

Almost surely, 2^345221651 is an apocalyptic number.

345221651 is a deficient number, since it is larger than the sum of its proper divisors (22254829).

345221651 is a wasteful number, since it uses less digits than its factorization.

345221651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546.

The product of its digits is 7200, while the sum is 29.

The square root of 345221651 is about 18580.1413073206. The cubic root of 345221651 is about 701.5080758878.

The spelling of 345221651 in words is "three hundred forty-five million, two hundred twenty-one thousand, six hundred fifty-one".