40521573 has 8 divisors (see below), whose sum is σ = 60032000. Its totient is φ = 27014364.

The previous prime is 40521563. The next prime is 40521577. The reversal of 40521573 is 37512504.

It is a happy number.

40521573 is a `hidden beast` number, since 40 + 52 + 1 + 573 = 666.

It is not a de Polignac number, because 40521573 - 2⁵ = 40521541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1500799 = 40521573 / (4 + 0 + 5 + 2 + 1 + 5 + 7 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40521577) 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, 750373 + ... + 750426.

It is an arithmetic number, because the mean of its divisors is an integer number (7504000).

Almost surely, 2^40521573 is an apocalyptic number.

It is an amenable number.

40521573 is a deficient number, since it is larger than the sum of its proper divisors (19510427).

40521573 is a wasteful number, since it uses less digits than its factorization.

40521573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500808 (or 1500802 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 40521573 is about 6365.6557399847. The cubic root of 40521573 is about 343.4752370547.

It can be divided in two parts, 4052 and 1573, that added together give a square (5625 = 75²).

The spelling of 40521573 in words is "forty million, five hundred twenty-one thousand, five hundred seventy-three".