22770731 has 2 divisors, whose sum is σ = 22770732. Its totient is φ = 22770730.

The previous prime is 22770707. The next prime is 22770733. The reversal of 22770731 is 13707722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22770731 - 2¹⁸ = 22508587 is a prime.

It is a super-2 number, since 2×22770731² = 1037012380548722, which contains 22 as substring.

Together with 22770733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22770694 and 22770703.

It is not a weakly prime, because it can be changed into another prime (22770733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11385365 + 11385366.

It is an arithmetic number, because the mean of its divisors is an integer number (11385366).

Almost surely, 2^22770731 is an apocalyptic number.

22770731 is a deficient number, since it is larger than the sum of its proper divisors (1).

22770731 is an equidigital number, since it uses as much as digits as its factorization.

22770731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 22770731 is about 4771.8687115217. The cubic root of 22770731 is about 283.4385978728.

The spelling of 22770731 in words is "twenty-two million, seven hundred seventy thousand, seven hundred thirty-one".