40905501 has 16 divisors (see below), whose sum is σ = 67127424. Its totient is φ = 21576384.

The previous prime is 40905497. The next prime is 40905503. The reversal of 40905501 is 10550904.

It is not a de Polignac number, because 40905501 - 2² = 40905497 is a prime.

It is a super-2 number, since 2×40905501² = 3346520024122002, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40905503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74646 + ... + 75191.

It is an arithmetic number, because the mean of its divisors is an integer number (4195464).

Almost surely, 2^40905501 is an apocalyptic number.

It is an amenable number.

40905501 is a deficient number, since it is larger than the sum of its proper divisors (26221923).

40905501 is a wasteful number, since it uses less digits than its factorization.

40905501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149860.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 40905501 is about 6395.7408484084. The cubic root of 40905501 is about 344.5565990383.

It can be divided in two parts, 4090 and 5501, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 40905501 in words is "forty million, nine hundred five thousand, five hundred one".