351220431 has 8 divisors (see below), whose sum is σ = 479184640. Its totient is φ = 228701592.

The previous prime is 351220427. The next prime is 351220439. The reversal of 351220431 is 134022153.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 351220431 - 2² = 351220427 is a prime.

It is a super-2 number, since 2×351220431² = 246711582303651522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 351220398 and 351220407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351220439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1361191 + ... + 1361448.

It is an arithmetic number, because the mean of its divisors is an integer number (59898080).

Almost surely, 2^351220431 is an apocalyptic number.

351220431 is a deficient number, since it is larger than the sum of its proper divisors (127964209).

351220431 is a wasteful number, since it uses less digits than its factorization.

351220431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722685.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 351220431 is about 18740.8759400408. The cubic root of 351220431 is about 705.5480412433.

Adding to 351220431 its reverse (134022153), we get a palindrome (485242584).

The spelling of 351220431 in words is "three hundred fifty-one million, two hundred twenty thousand, four hundred thirty-one".