351142391 has 2 divisors, whose sum is σ = 351142392. Its totient is φ = 351142390.

The previous prime is 351142381. The next prime is 351142423. The reversal of 351142391 is 193241153.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 351142391 - 2¹⁸ = 350880247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351142381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175571195 + 175571196.

It is an arithmetic number, because the mean of its divisors is an integer number (175571196).

Almost surely, 2^351142391 is an apocalyptic number.

351142391 is a deficient number, since it is larger than the sum of its proper divisors (1).

351142391 is an equidigital number, since it uses as much as digits as its factorization.

351142391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 351142391 is about 18738.7937445290. The cubic root of 351142391 is about 705.4957805708.

The spelling of 351142391 in words is "three hundred fifty-one million, one hundred forty-two thousand, three hundred ninety-one".