351222989 has 4 divisors (see below), whose sum is σ = 378240156. Its totient is φ = 324205824.

The previous prime is 351222967. The next prime is 351223001. The reversal of 351222989 is 989222153.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 218005225 + 133217764 = 14765^2 + 11542^2 .

It is a cyclic number.

It is not a de Polignac number, because 351222989 - 2¹² = 351218893 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 (351222919) 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, 13508564 + ... + 13508589.

It is an arithmetic number, because the mean of its divisors is an integer number (94560039).

Almost surely, 2^351222989 is an apocalyptic number.

It is an amenable number.

351222989 is a deficient number, since it is larger than the sum of its proper divisors (27017167).

351222989 is a wasteful number, since it uses less digits than its factorization.

351222989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27017166.

The product of its digits is 77760, while the sum is 41.

The square root of 351222989 is about 18740.9441864598. The cubic root of 351222989 is about 705.5497541158.

The spelling of 351222989 in words is "three hundred fifty-one million, two hundred twenty-two thousand, nine hundred eighty-nine".