312213040 has 40 divisors (see below), whose sum is σ = 757460448. Its totient is φ = 119454720.

The previous prime is 312213029. The next prime is 312213047. The reversal of 312213040 is 40312213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (312213047) 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, 83001 + ... + 86680.

Almost surely, 2^312213040 is an apocalyptic number.

It is an amenable number.

312213040 is an abundant number, since it is smaller than the sum of its proper divisors (445247408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312213040 is a wasteful number, since it uses less digits than its factorization.

312213040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169717 (or 169711 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 312213040 is about 17669.5512110523. The cubic root of 312213040 is about 678.3966260623.

Adding to 312213040 its reverse (40312213), we get a palindrome (352525253).

The spelling of 312213040 in words is "three hundred twelve million, two hundred thirteen thousand, forty".