322138631 has 2 divisors, whose sum is σ = 322138632. Its totient is φ = 322138630.

The previous prime is 322138601. The next prime is 322138657. The reversal of 322138631 is 136831223.

It is a strong prime.

It is an emirp because it is prime and its reverse (136831223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 322138631 - 2⁶ = 322138567 is a prime.

It is a super-2 number, since 2×322138631² = 207546595165108322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 322138594 and 322138603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322138601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161069315 + 161069316.

It is an arithmetic number, because the mean of its divisors is an integer number (161069316).

Almost surely, 2^322138631 is an apocalyptic number.

322138631 is a deficient number, since it is larger than the sum of its proper divisors (1).

322138631 is an equidigital number, since it uses as much as digits as its factorization.

322138631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 322138631 is about 17948.2208310462. The cubic root of 322138631 is about 685.5107498452.

Adding to 322138631 its reverse (136831223), we get a palindrome (458969854).

The spelling of 322138631 in words is "three hundred twenty-two million, one hundred thirty-eight thousand, six hundred thirty-one".