311142901 has 4 divisors (see below), whose sum is σ = 313896492. Its totient is φ = 308389312.

The previous prime is 311142889. The next prime is 311142989. The reversal of 311142901 is 109241113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 122080401 + 189062500 = 11049^2 + 13750^2 .

It is a cyclic number.

It is not a de Polignac number, because 311142901 - 2⁵ = 311142869 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 (311142101) 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, 1376626 + ... + 1376851.

It is an arithmetic number, because the mean of its divisors is an integer number (78474123).

Almost surely, 2^311142901 is an apocalyptic number.

It is an amenable number.

311142901 is a deficient number, since it is larger than the sum of its proper divisors (2753591).

311142901 is a wasteful number, since it uses less digits than its factorization.

311142901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753590.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 311142901 is about 17639.2432093897. The cubic root of 311142901 is about 677.6206498005.

The spelling of 311142901 in words is "three hundred eleven million, one hundred forty-two thousand, nine hundred one".