40440051 has 12 divisors (see below), whose sum is σ = 58568640. Its totient is φ = 26888400.

The previous prime is 40440019. The next prime is 40440077. The reversal of 40440051 is 15004404.

It is not a de Polignac number, because 40440051 - 2⁵ = 40440019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40440091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2275 + ... + 9276.

It is an arithmetic number, because the mean of its divisors is an integer number (4880720).

Almost surely, 2^40440051 is an apocalyptic number.

40440051 is a deficient number, since it is larger than the sum of its proper divisors (18128589).

40440051 is a wasteful number, since it uses less digits than its factorization.

40440051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11946 (or 11943 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40440051 is about 6359.2492481424. The cubic root of 40440051 is about 343.2447459467.

Adding to 40440051 its reverse (15004404), we get a palindrome (55444455).

The spelling of 40440051 in words is "forty million, four hundred forty thousand, fifty-one".