913222881 has 24 divisors (see below), whose sum is σ = 1398223944. Its totient is φ = 572375040.

The previous prime is 913222879. The next prime is 913222883. The reversal of 913222881 is 188222319.

It is an interprime number because it is at equal distance from previous prime (913222879) and next prime (913222883).

It can be written as a sum of positive squares in 4 ways, for example, as 247118400 + 666104481 = 15720^2 + 25809^2 .

It is not a de Polignac number, because 913222881 - 2¹ = 913222879 is a prime.

It is a super-2 number, since 2×913222881² = 1667952060763880322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (913222883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165121 + ... + 170561.

It is an arithmetic number, because the mean of its divisors is an integer number (58259331).

Almost surely, 2^913222881 is an apocalyptic number.

It is an amenable number.

913222881 is a deficient number, since it is larger than the sum of its proper divisors (485001063).

913222881 is a wasteful number, since it uses less digits than its factorization.

913222881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561 (or 6558 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 913222881 is about 30219.5777766666. The cubic root of 913222881 is about 970.1947676350.

The spelling of 913222881 in words is "nine hundred thirteen million, two hundred twenty-two thousand, eight hundred eighty-one".