15222826981 has 2 divisors, whose sum is σ = 15222826982. Its totient is φ = 15222826980.

The previous prime is 15222826951. The next prime is 15222827023. The reversal of 15222826981 is 18962822251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13385333025 + 1837493956 = 115695^2 + 42866^2 .

It is a cyclic number.

It is not a de Polignac number, because 15222826981 - 2⁹ = 15222826469 is a prime.

It is a super-2 number, since 2×15222826981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15222826951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7611413490 + 7611413491.

It is an arithmetic number, because the mean of its divisors is an integer number (7611413491).

Almost surely, 2^15222826981 is an apocalyptic number.

It is an amenable number.

15222826981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15222826981 is an equidigital number, since it uses as much as digits as its factorization.

15222826981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The spelling of 15222826981 in words is "fifteen billion, two hundred twenty-two million, eight hundred twenty-six thousand, nine hundred eighty-one".