351218241 has 32 divisors (see below), whose sum is σ = 568995840. Its totient is φ = 212346000.

The previous prime is 351218237. The next prime is 351218267. The reversal of 351218241 is 142812153.

It is not a de Polignac number, because 351218241 - 2² = 351218237 is a prime.

It is a super-2 number, since 2×351218241² = 246708505622268162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (351218041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148216 + ... + 150566.

It is an arithmetic number, because the mean of its divisors is an integer number (17781120).

Almost surely, 2^351218241 is an apocalyptic number.

It is an amenable number.

351218241 is a deficient number, since it is larger than the sum of its proper divisors (217777599).

351218241 is a wasteful number, since it uses less digits than its factorization.

351218241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874 (or 2868 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 351218241 is about 18740.8175115175. The cubic root of 351218241 is about 705.5465747821.

The spelling of 351218241 in words is "three hundred fifty-one million, two hundred eighteen thousand, two hundred forty-one".