40551013 has 4 divisors (see below), whose sum is σ = 41156320. Its totient is φ = 39945708.

The previous prime is 40550999. The next prime is 40551023. The reversal of 40551013 is 31015504.

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 40551013 - 2⁹ = 40550501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40551023) 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, 302553 + ... + 302686.

It is an arithmetic number, because the mean of its divisors is an integer number (10289080).

Almost surely, 2^40551013 is an apocalyptic number.

It is an amenable number.

40551013 is a deficient number, since it is larger than the sum of its proper divisors (605307).

40551013 is an equidigital number, since it uses as much as digits as its factorization.

40551013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605306.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 40551013 is about 6367.9677291896. The cubic root of 40551013 is about 343.5583982152.

Adding to 40551013 its reverse (31015504), we get a palindrome (71566517).

The spelling of 40551013 in words is "forty million, five hundred fifty-one thousand, thirteen".