351616421 has 8 divisors (see below), whose sum is σ = 378921984. Its totient is φ = 324347760.

The previous prime is 351616411. The next prime is 351616481. The reversal of 351616421 is 124616153.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 351616421 - 2¹⁸ = 351354277 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 (351616411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12476 + ... + 29306.

It is an arithmetic number, because the mean of its divisors is an integer number (47365248).

Almost surely, 2^351616421 is an apocalyptic number.

It is an amenable number.

351616421 is a deficient number, since it is larger than the sum of its proper divisors (27305563).

351616421 is a wasteful number, since it uses less digits than its factorization.

351616421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18451.

The product of its digits is 4320, while the sum is 29.

The square root of 351616421 is about 18751.4378382032. The cubic root of 351616421 is about 705.8131027344.

The spelling of 351616421 in words is "three hundred fifty-one million, six hundred sixteen thousand, four hundred twenty-one".