972227781 has 24 divisors (see below), whose sum is σ = 1606423104. Its totient is φ = 555048000.

The previous prime is 972227771. The next prime is 972227791. The reversal of 972227781 is 187722279.

972227781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (972227771) and next prime (972227791).

It is not a de Polignac number, because 972227781 - 2⁵ = 972227749 is a prime.

It is a super-2 number, since 2×972227781² = 1890453716296367922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972227731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68281 + ... + 81281.

It is an arithmetic number, because the mean of its divisors is an integer number (66934296).

Almost surely, 2^972227781 is an apocalyptic number.

It is an amenable number.

972227781 is a deficient number, since it is larger than the sum of its proper divisors (634195323).

972227781 is a wasteful number, since it uses less digits than its factorization.

972227781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14201 (or 14198 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 972227781 is about 31180.5673617399. The cubic root of 972227781 is about 990.6555468440.

The spelling of 972227781 in words is "nine hundred seventy-two million, two hundred twenty-seven thousand, seven hundred eighty-one".