312225257100 has 72 divisors (see below), whose sum is σ = 911659653520. Its totient is φ = 82496206080.

The previous prime is 312225257089. The next prime is 312225257137. The reversal of 312225257100 is 1752522213.

It is a super-2 number, since 2×312225257100² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4741387 + ... + 4806786.

Almost surely, 2^312225257100 is an apocalyptic number.

312225257100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312225257100 is an abundant number, since it is smaller than the sum of its proper divisors (599434396420).

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

312225257100 is a wasteful number, since it uses less digits than its factorization.

312225257100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548299 (or 9548292 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

Adding to 312225257100 its reverse (1752522213), we get a palindrome (313977779313).

The spelling of 312225257100 in words is "three hundred twelve billion, two hundred twenty-five million, two hundred fifty-seven thousand, one hundred".