825473287421 has 4 divisors (see below), whose sum is σ = 825566181792. Its totient is φ = 825380393052.

The previous prime is 825473287403. The next prime is 825473287433. The reversal of 825473287421 is 124782374528.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825473287421 is a prime.

It is a super-2 number, since 2×825473287421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825473287021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46433855 + ... + 46451628.

It is an arithmetic number, because the mean of its divisors is an integer number (206391545448).

Almost surely, 2^825473287421 is an apocalyptic number.

It is an amenable number.

825473287421 is a deficient number, since it is larger than the sum of its proper divisors (92894371).

825473287421 is an equidigital number, since it uses as much as digits as its factorization.

825473287421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92894370.

The product of its digits is 6021120, while the sum is 53.

The spelling of 825473287421 in words is "eight hundred twenty-five billion, four hundred seventy-three million, two hundred eighty-seven thousand, four hundred twenty-one".