311421207 has 4 divisors (see below), whose sum is σ = 415228280. Its totient is φ = 207614136.

The previous prime is 311421137. The next prime is 311421211. The reversal of 311421207 is 702124113.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 311421207 - 2¹⁸ = 311159063 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 (311421247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51903532 + ... + 51903537.

It is an arithmetic number, because the mean of its divisors is an integer number (103807070).

Almost surely, 2^311421207 is an apocalyptic number.

311421207 is a deficient number, since it is larger than the sum of its proper divisors (103807073).

311421207 is a wasteful number, since it uses less digits than its factorization.

311421207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103807072.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 311421207 is about 17647.1302766200. The cubic root of 311421207 is about 677.8226252616.

The spelling of 311421207 in words is "three hundred eleven million, four hundred twenty-one thousand, two hundred seven".