40505613 has 8 divisors (see below), whose sum is σ = 55263648. Its totient is φ = 26375664.

The previous prime is 40505567. The next prime is 40505617. The reversal of 40505613 is 31650504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40505613 - 2¹⁰ = 40504589 is a prime.

It is a super-3 number, since 3×40505613³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156870 + ... + 157127.

It is an arithmetic number, because the mean of its divisors is an integer number (6907956).

Almost surely, 2^40505613 is an apocalyptic number.

40505613 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

40505613 is a deficient number, since it is larger than the sum of its proper divisors (14758035).

40505613 is a wasteful number, since it uses less digits than its factorization.

40505613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314043.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 40505613 is about 6364.4020143294. The cubic root of 40505613 is about 343.4301369246.

The spelling of 40505613 in words is "forty million, five hundred five thousand, six hundred thirteen".