822131493 has 4 divisors (see below), whose sum is σ = 1096175328. Its totient is φ = 548087660.

The previous prime is 822131483. The next prime is 822131521. The reversal of 822131493 is 394131228.

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 not a de Polignac number, because 822131493 - 2⁵ = 822131461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822131483) 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, 137021913 + ... + 137021918.

It is an arithmetic number, because the mean of its divisors is an integer number (274043832).

Almost surely, 2^822131493 is an apocalyptic number.

It is an amenable number.

822131493 is a deficient number, since it is larger than the sum of its proper divisors (274043835).

822131493 is a wasteful number, since it uses less digits than its factorization.

822131493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274043834.

The product of its digits is 10368, while the sum is 33.

The square root of 822131493 is about 28672.8354544855. The cubic root of 822131493 is about 936.8004591976.

The spelling of 822131493 in words is "eight hundred twenty-two million, one hundred thirty-one thousand, four hundred ninety-three".