312452522621 has 4 divisors (see below), whose sum is σ = 314022636000. Its totient is φ = 310882409244.

The previous prime is 312452522597. The next prime is 312452522687. The reversal of 312452522621 is 126225254213.

It is a happy number.

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: 126225254213 = 23 ⋅5488054531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312452522621 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 (312452522021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785056391 + ... + 785056788.

It is an arithmetic number, because the mean of its divisors is an integer number (78505659000).

Almost surely, 2^312452522621 is an apocalyptic number.

It is an amenable number.

312452522621 is a deficient number, since it is larger than the sum of its proper divisors (1570113379).

312452522621 is a wasteful number, since it uses less digits than its factorization.

312452522621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570113378.

The product of its digits is 57600, while the sum is 35.

Adding to 312452522621 its reverse (126225254213), we get a palindrome (438677776834).

The spelling of 312452522621 in words is "three hundred twelve billion, four hundred fifty-two million, five hundred twenty-two thousand, six hundred twenty-one".