53422981 has 2 divisors, whose sum is σ = 53422982. Its totient is φ = 53422980.

The previous prime is 53422949. The next prime is 53422987. The reversal of 53422981 is 18922435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 18198756 = 5935^2 + 4266^2 .

It is a cyclic number.

It is not a de Polignac number, because 53422981 - 2⁵ = 53422949 is a prime.

It is a super-2 number, since 2×53422981² = 5708029797852722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53422987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26711490 + 26711491.

It is an arithmetic number, because the mean of its divisors is an integer number (26711491).

Almost surely, 2^53422981 is an apocalyptic number.

It is an amenable number.

53422981 is a deficient number, since it is larger than the sum of its proper divisors (1).

53422981 is an equidigital number, since it uses as much as digits as its factorization.

53422981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 53422981 is about 7309.1026124963. The cubic root of 53422981 is about 376.6251977040.

The spelling of 53422981 in words is "fifty-three million, four hundred twenty-two thousand, nine hundred eighty-one".