311213134 has 4 divisors (see below), whose sum is σ = 466819704. Its totient is φ = 155606566.

The previous prime is 311213131. The next prime is 311213137. The reversal of 311213134 is 431312113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 431312113 = 79 ⋅5459647.

It is an interprime number because it is at equal distance from previous prime (311213131) and next prime (311213137).

It is a super-2 number, since 2×311213134² = 193707229548203912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311213131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77803282 + ... + 77803285.

It is an arithmetic number, because the mean of its divisors is an integer number (116704926).

Almost surely, 2^311213134 is an apocalyptic number.

311213134 is a deficient number, since it is larger than the sum of its proper divisors (155606570).

311213134 is a wasteful number, since it uses less digits than its factorization.

311213134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155606569.

The product of its digits is 216, while the sum is 19.

The square root of 311213134 is about 17641.2339137601. The cubic root of 311213134 is about 677.6716314668.

Adding to 311213134 its reverse (431312113), we get a palindrome (742525247).

The spelling of 311213134 in words is "three hundred eleven million, two hundred thirteen thousand, one hundred thirty-four".