311139445 has 8 divisors (see below), whose sum is σ = 373486680. Its totient is φ = 248832000.

The previous prime is 311139373. The next prime is 311139449. The reversal of 311139445 is 544931113.

It can be written as a sum of positive squares in 4 ways, for example, as 108618084 + 202521361 = 10422^2 + 14231^2 .

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

It is not a de Polignac number, because 311139445 - 2⁷ = 311139317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311139449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11445 + ... + 27445.

It is an arithmetic number, because the mean of its divisors is an integer number (46685835).

Almost surely, 2^311139445 is an apocalyptic number.

It is an amenable number.

311139445 is a deficient number, since it is larger than the sum of its proper divisors (62347235).

311139445 is a wasteful number, since it uses less digits than its factorization.

311139445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19895.

The product of its digits is 6480, while the sum is 31.

The square root of 311139445 is about 17639.1452457312. The cubic root of 311139445 is about 677.6181409151.

The spelling of 311139445 in words is "three hundred eleven million, one hundred thirty-nine thousand, four hundred forty-five".