40302281 has 4 divisors (see below), whose sum is σ = 40610064. Its totient is φ = 39994500.

The previous prime is 40302271. The next prime is 40302289. The reversal of 40302281 is 18220304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40302281 - 2⁶ = 40302217 is a prime.

It is a super-2 number, since 2×40302281² = 3248547707605922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40302289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153695 + ... + 153956.

It is an arithmetic number, because the mean of its divisors is an integer number (10152516).

Almost surely, 2^40302281 is an apocalyptic number.

It is an amenable number.

40302281 is a deficient number, since it is larger than the sum of its proper divisors (307783).

40302281 is a wasteful number, since it uses less digits than its factorization.

40302281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307782.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 40302281 is about 6348.4077531299. The cubic root of 40302281 is about 342.8545170351.

Adding to 40302281 its reverse (18220304), we get a palindrome (58522585).

The spelling of 40302281 in words is "forty million, three hundred two thousand, two hundred eighty-one".