202738081 has 16 divisors (see below), whose sum is σ = 250475008. Its totient is φ = 159796800.

The previous prime is 202738079. The next prime is 202738099. The reversal of 202738081 is 180837202.

It is a 6-Lehmer number, since φ(202738081) divides (202738081-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 202738081 - 2¹ = 202738079 is a prime.

It is a super-2 number, since 2×202738081² = 82205458975125122, which contains 22 as substring.

It is a deceptive number, since it divides R_202738080.

It is not an unprimeable number, because it can be changed into a prime (202738061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20551 + ... + 28771.

It is an arithmetic number, because the mean of its divisors is an integer number (15654688).

Almost surely, 2^202738081 is an apocalyptic number.

202738081 is the 8221-st octagonal number.

It is an amenable number.

202738081 is a deficient number, since it is larger than the sum of its proper divisors (47736927).

202738081 is a wasteful number, since it uses less digits than its factorization.

202738081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8512.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 202738081 is about 14238.6123270493. The cubic root of 202738081 is about 587.4601932287.

The spelling of 202738081 in words is "two hundred two million, seven hundred thirty-eight thousand, eighty-one".