311143402 has 8 divisors (see below), whose sum is σ = 487007136. Its totient is φ = 148807692.

The previous prime is 311143369. The next prime is 311143409. The reversal of 311143402 is 204341113.

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

It is a self number, because there is not a number n which added to its sum of digits gives 311143402.

It is not an unprimeable number, because it can be changed into a prime (311143409) 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, 3381948 + ... + 3382039.

It is an arithmetic number, because the mean of its divisors is an integer number (60875892).

Almost surely, 2^311143402 is an apocalyptic number.

311143402 is a deficient number, since it is larger than the sum of its proper divisors (175863734).

311143402 is a wasteful number, since it uses less digits than its factorization.

311143402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6764012.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 311143402 is about 17639.2574106735. The cubic root of 311143402 is about 677.6210135002.

Adding to 311143402 its reverse (204341113), we get a palindrome (515484515).

The spelling of 311143402 in words is "three hundred eleven million, one hundred forty-three thousand, four hundred two".