22261429 has 2 divisors, whose sum is σ = 22261430. Its totient is φ = 22261428.

The previous prime is 22261427. The next prime is 22261439. The reversal of 22261429 is 92416222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20566225 + 1695204 = 4535^2 + 1302^2 .

It is a cyclic number.

It is not a de Polignac number, because 22261429 - 2¹ = 22261427 is a prime.

It is a super-2 number, since 2×22261429² = 991142442244082, which contains 22 as substring.

Together with 22261427, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22261397 and 22261406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22261427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11130714 + 11130715.

It is an arithmetic number, because the mean of its divisors is an integer number (11130715).

Almost surely, 2^22261429 is an apocalyptic number.

It is an amenable number.

22261429 is a deficient number, since it is larger than the sum of its proper divisors (1).

22261429 is an equidigital number, since it uses as much as digits as its factorization.

22261429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 22261429 is about 4718.2018820733. The cubic root of 22261429 is about 281.3094660103.

It can be divided in two parts, 2226 and 1429, that added together give a triangular number (3655 = T₈₅).

The spelling of 22261429 in words is "twenty-two million, two hundred sixty-one thousand, four hundred twenty-nine".