312100133 has 4 divisors (see below), whose sum is σ = 325669728. Its totient is φ = 298530540.

The previous prime is 312100123. The next prime is 312100153. The reversal of 312100133 is 331001213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331001213 = 47 ⋅7042579.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312100133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312100123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6784763 + ... + 6784808.

It is an arithmetic number, because the mean of its divisors is an integer number (81417432).

Almost surely, 2^312100133 is an apocalyptic number.

It is an amenable number.

312100133 is a deficient number, since it is larger than the sum of its proper divisors (13569595).

312100133 is a wasteful number, since it uses less digits than its factorization.

312100133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13569594.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 312100133 is about 17666.3559626766. The cubic root of 312100133 is about 678.3148389991.

Adding to 312100133 its reverse (331001213), we get a palindrome (643101346).

The spelling of 312100133 in words is "three hundred twelve million, one hundred thousand, one hundred thirty-three".