40521415 has 16 divisors (see below), whose sum is σ = 54050976. Its totient is φ = 28912000.

The previous prime is 40521413. The next prime is 40521427. The reversal of 40521415 is 51412504.

It is not a de Polignac number, because 40521415 - 2¹ = 40521413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40521413) 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, 4036 + ... + 9865.

It is an arithmetic number, because the mean of its divisors is an integer number (3378186).

Almost surely, 2^40521415 is an apocalyptic number.

40521415 is a deficient number, since it is larger than the sum of its proper divisors (13529561).

40521415 is a wasteful number, since it uses less digits than its factorization.

40521415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13970.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 40521415 is about 6365.6433296251. The cubic root of 40521415 is about 343.4747906328.

Adding to 40521415 its reverse (51412504), we get a palindrome (91933919).

The spelling of 40521415 in words is "forty million, five hundred twenty-one thousand, four hundred fifteen".