351122981 has 16 divisors (see below), whose sum is σ = 419567040. Its totient is φ = 290062080.

The previous prime is 351122969. The next prime is 351123001. The reversal of 351122981 is 189221153.

It is a happy number.

It is not a de Polignac number, because 351122981 - 2²⁶ = 284014117 is a prime.

It is a super-2 number, since 2×351122981² = 246574695572652722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351122581) 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, 26951 + ... + 37796.

It is an arithmetic number, because the mean of its divisors is an integer number (26222940).

Almost surely, 2^351122981 is an apocalyptic number.

It is an amenable number.

351122981 is a deficient number, since it is larger than the sum of its proper divisors (68444059).

351122981 is a wasteful number, since it uses less digits than its factorization.

351122981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64804.

The product of its digits is 4320, while the sum is 32.

The square root of 351122981 is about 18738.2758278343. The cubic root of 351122981 is about 705.4827811668.

The spelling of 351122981 in words is "three hundred fifty-one million, one hundred twenty-two thousand, nine hundred eighty-one".