202106881 has 2 divisors, whose sum is σ = 202106882. Its totient is φ = 202106880.

The previous prime is 202106809. The next prime is 202106899. The reversal of 202106881 is 188601202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139617856 + 62489025 = 11816^2 + 7905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202106881 is a prime.

It is a super-2 number, since 2×202106881² = 81694382695096322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (202106981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101053440 + 101053441.

It is an arithmetic number, because the mean of its divisors is an integer number (101053441).

Almost surely, 2^202106881 is an apocalyptic number.

It is an amenable number.

202106881 is a deficient number, since it is larger than the sum of its proper divisors (1).

202106881 is an equidigital number, since it uses as much as digits as its factorization.

202106881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 202106881 is about 14216.4299667673. The cubic root of 202106881 is about 586.8498978210.

The spelling of 202106881 in words is "two hundred two million, one hundred six thousand, eight hundred eighty-one".