40213513 has 2 divisors, whose sum is σ = 40213514. Its totient is φ = 40213512.

The previous prime is 40213469. The next prime is 40213531. The reversal of 40213513 is 31531204.

Together with next prime (40213531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36324729 + 3888784 = 6027^2 + 1972^2 .

It is a cyclic number.

It is not a de Polignac number, because 40213513 - 2⁹ = 40213001 is a prime.

It is not a weakly prime, because it can be changed into another prime (40213543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20106756 + 20106757.

It is an arithmetic number, because the mean of its divisors is an integer number (20106757).

Almost surely, 2^40213513 is an apocalyptic number.

It is an amenable number.

40213513 is a deficient number, since it is larger than the sum of its proper divisors (1).

40213513 is an equidigital number, since it uses as much as digits as its factorization.

40213513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 40213513 is about 6341.4125398053. The cubic root of 40213513 is about 342.6026133301.

Adding to 40213513 its reverse (31531204), we get a palindrome (71744717).

The spelling of 40213513 in words is "forty million, two hundred thirteen thousand, five hundred thirteen".