311212345 has 8 divisors (see below), whose sum is σ = 382563720. Its totient is φ = 242897280.

The previous prime is 311212313. The next prime is 311212361. The reversal of 311212345 is 543212113.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1065024 + 310147321 = 1032^2 + 17611^2 .

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

It is not a de Polignac number, because 311212345 - 2⁵ = 311212313 is a prime.

It is a super-3 number, since 3×311212345³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758850 + ... + 759259.

It is an arithmetic number, because the mean of its divisors is an integer number (47820465).

Almost surely, 2^311212345 is an apocalyptic number.

It is an amenable number.

311212345 is a deficient number, since it is larger than the sum of its proper divisors (71351375).

311212345 is a wasteful number, since it uses less digits than its factorization.

311212345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518155.

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

The square root of 311212345 is about 17641.2115513646. The cubic root of 311212345 is about 677.6710587796.

Adding to 311212345 its reverse (543212113), we get a palindrome (854424458).

The spelling of 311212345 in words is "three hundred eleven million, two hundred twelve thousand, three hundred forty-five".