1822728631 has 2 divisors, whose sum is σ = 1822728632. Its totient is φ = 1822728630.

The previous prime is 1822728599. The next prime is 1822728647. The reversal of 1822728631 is 1368272281.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1822728631 - 2⁵ = 1822728599 is a prime.

It is a super-2 number, since 2×1822728631² = 6644679324534268322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1822720631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911364315 + 911364316.

It is an arithmetic number, because the mean of its divisors is an integer number (911364316).

Almost surely, 2^1822728631 is an apocalyptic number.

1822728631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1822728631 is an equidigital number, since it uses as much as digits as its factorization.

1822728631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 1822728631 is about 42693.4260864597. The cubic root of 1822728631 is about 1221.5390035224.

The spelling of 1822728631 in words is "one billion, eight hundred twenty-two million, seven hundred twenty-eight thousand, six hundred thirty-one".