40451013 has 12 divisors (see below), whose sum is σ = 58513728. Its totient is φ = 26928360.

The previous prime is 40451009. The next prime is 40451017. The reversal of 40451013 is 31015404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40451009) and next prime (40451017).

It is not a de Polignac number, because 40451013 - 2² = 40451009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40451017) 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, 4228 + ... + 9938.

It is an arithmetic number, because the mean of its divisors is an integer number (4876144).

Almost surely, 2^40451013 is an apocalyptic number.

It is an amenable number.

40451013 is a deficient number, since it is larger than the sum of its proper divisors (18062715).

40451013 is a wasteful number, since it uses less digits than its factorization.

40451013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6504 (or 6501 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40451013 is about 6360.1110839356. Note that the first 3 decimals coincide. The cubic root of 40451013 is about 343.2757573565.

Adding to 40451013 its reverse (31015404), we get a palindrome (71466417).

The spelling of 40451013 in words is "forty million, four hundred fifty-one thousand, thirteen".