40342281 has 16 divisors (see below), whose sum is σ = 61563264. Its totient is φ = 23019264.

The previous prime is 40342259. The next prime is 40342283. The reversal of 40342281 is 18224304.

It is not a de Polignac number, because 40342281 - 2¹³ = 40334089 is a prime.

It is a super-2 number, since 2×40342281² = 3254999272565922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40342283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25201 + ... + 26753.

It is an arithmetic number, because the mean of its divisors is an integer number (3847704).

Almost surely, 2^40342281 is an apocalyptic number.

It is an amenable number.

40342281 is a deficient number, since it is larger than the sum of its proper divisors (21220983).

40342281 is a wasteful number, since it uses less digits than its factorization.

40342281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 40342281 is about 6351.5573680791. The cubic root of 40342281 is about 342.9679071935.

Adding to 40342281 its reverse (18224304), we get a palindrome (58566585).

The spelling of 40342281 in words is "forty million, three hundred forty-two thousand, two hundred eighty-one".