40521699 has 24 divisors (see below), whose sum is σ = 64296960. Its totient is φ = 24477552.

The previous prime is 40521673. The next prime is 40521709. The reversal of 40521699 is 99612504.

40521699 is a `hidden beast` number, since 40 + 521 + 6 + 99 = 666.

It is not a de Polignac number, because 40521699 - 2⁸ = 40521443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40521599) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1219 + ... + 9084.

It is an arithmetic number, because the mean of its divisors is an integer number (2679040).

Almost surely, 2^40521699 is an apocalyptic number.

40521699 is a deficient number, since it is larger than the sum of its proper divisors (23775261).

40521699 is a wasteful number, since it uses less digits than its factorization.

40521699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10351 (or 10348 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 40521699 is about 6365.6656368364. The cubic root of 40521699 is about 343.4755930613.

It can be divided in two parts, 4052169 and 9, that multiplied together give a square (36469521 = 6039²).

The spelling of 40521699 in words is "forty million, five hundred twenty-one thousand, six hundred ninety-nine".