311621419 has 2 divisors, whose sum is σ = 311621420. Its totient is φ = 311621418.

The previous prime is 311621389. The next prime is 311621447. The reversal of 311621419 is 914126113.

It is an a-pointer prime, because the next prime (311621447) can be obtained adding 311621419 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311621419 - 2¹³ = 311613227 is a prime.

It is a super-2 number, since 2×311621419² = 194215817559147122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311621449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155810709 + 155810710.

It is an arithmetic number, because the mean of its divisors is an integer number (155810710).

Almost surely, 2^311621419 is an apocalyptic number.

311621419 is a deficient number, since it is larger than the sum of its proper divisors (1).

311621419 is an equidigital number, since it uses as much as digits as its factorization.

311621419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 311621419 is about 17652.8020155442. The cubic root of 311621419 is about 677.9678510294.

The spelling of 311621419 in words is "three hundred eleven million, six hundred twenty-one thousand, four hundred nineteen".