311513422 has 16 divisors (see below), whose sum is σ = 510187392. Its totient is φ = 141475320.

The previous prime is 311513407. The next prime is 311513429. The reversal of 311513422 is 224315113.

It is a happy number.

It is a super-2 number, since 2×311513422² = 194081224172300168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 311513393 and 311513402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311513429) 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, 23233 + ... + 34099.

It is an arithmetic number, because the mean of its divisors is an integer number (31886712).

Almost surely, 2^311513422 is an apocalyptic number.

311513422 is a deficient number, since it is larger than the sum of its proper divisors (198673970).

311513422 is a wasteful number, since it uses less digits than its factorization.

311513422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12183.

The product of its digits is 720, while the sum is 22.

The square root of 311513422 is about 17649.7428309877. The cubic root of 311513422 is about 677.8895220598.

Adding to 311513422 its reverse (224315113), we get a palindrome (535828535).

The spelling of 311513422 in words is "three hundred eleven million, five hundred thirteen thousand, four hundred twenty-two".