40521013 has 16 divisors (see below), whose sum is σ = 46506096. Its totient is φ = 34974720.

The previous prime is 40521011. The next prime is 40521029. The reversal of 40521013 is 31012504.

40521013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 19158129 + 21362884 = 4377^2 + 4622^2 .

It is a cyclic number.

It is not a de Polignac number, because 40521013 - 2¹ = 40521011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40521011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39495 + ... + 40507.

It is an arithmetic number, because the mean of its divisors is an integer number (2906631).

Almost surely, 2^40521013 is an apocalyptic number.

It is an amenable number.

40521013 is a deficient number, since it is larger than the sum of its proper divisors (5985083).

40521013 is a wasteful number, since it uses less digits than its factorization.

40521013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 40521013 is about 6365.6117537908. The cubic root of 40521013 is about 343.4736547945.

Adding to 40521013 its reverse (31012504), we get a palindrome (71533517).

It can be divided in two parts, 4052 and 1013, that multiplied together give a square (4104676 = 2026²).

The spelling of 40521013 in words is "forty million, five hundred twenty-one thousand, thirteen".