40903521 has 4 divisors (see below), whose sum is σ = 54538032. Its totient is φ = 27269012.

The previous prime is 40903517. The next prime is 40903531. The reversal of 40903521 is 12530904.

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 40903521 - 2² = 40903517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40903491 and 40903500.

It is not an unprimeable number, because it can be changed into a prime (40903531) 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, 6817251 + ... + 6817256.

It is an arithmetic number, because the mean of its divisors is an integer number (13634508).

Almost surely, 2^40903521 is an apocalyptic number.

It is an amenable number.

40903521 is a deficient number, since it is larger than the sum of its proper divisors (13634511).

40903521 is a wasteful number, since it uses less digits than its factorization.

40903521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13634510.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 40903521 is about 6395.5860560233. The cubic root of 40903521 is about 344.5510396143.

The spelling of 40903521 in words is "forty million, nine hundred three thousand, five hundred twenty-one".