40048081 has 4 divisors (see below), whose sum is σ = 40530672. Its totient is φ = 39565492.

The previous prime is 40048061. The next prime is 40048087. The reversal of 40048081 is 18084004.

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 40048081 - 2⁵ = 40048049 is a prime.

It is a super-2 number, since 2×40048081² = 3207697583565122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40048087) 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, 241171 + ... + 241336.

It is an arithmetic number, because the mean of its divisors is an integer number (10132668).

Almost surely, 2^40048081 is an apocalyptic number.

It is an amenable number.

40048081 is a deficient number, since it is larger than the sum of its proper divisors (482591).

40048081 is an equidigital number, since it uses as much as digits as its factorization.

40048081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482590.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 40048081 is about 6328.3553155619. The cubic root of 40048081 is about 342.1321633904.

The spelling of 40048081 in words is "forty million, forty-eight thousand, eighty-one".