40513623 has 4 divisors (see below), whose sum is σ = 54018168. Its totient is φ = 27009080.

The previous prime is 40513619. The next prime is 40513633. The reversal of 40513623 is 32631504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40513623 - 2² = 40513619 is a prime.

It is a super-2 number, since 2×40513623² = 3282707297172258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40513593 and 40513602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40513633) 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, 6752268 + ... + 6752273.

It is an arithmetic number, because the mean of its divisors is an integer number (13504542).

Almost surely, 2^40513623 is an apocalyptic number.

40513623 is a deficient number, since it is larger than the sum of its proper divisors (13504545).

40513623 is a wasteful number, since it uses less digits than its factorization.

40513623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13504544.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 40513623 is about 6365.0312646522. The cubic root of 40513623 is about 343.4527732449.

It can be divided in two parts, 405 and 13623, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 40513623 in words is "forty million, five hundred thirteen thousand, six hundred twenty-three".