40213553 has 2 divisors, whose sum is σ = 40213554. Its totient is φ = 40213552.

The previous prime is 40213549. The next prime is 40213559. The reversal of 40213553 is 35531204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33721249 + 6492304 = 5807^2 + 2548^2 .

It is a cyclic number.

It is not a de Polignac number, because 40213553 - 2² = 40213549 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40213559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20106776 + 20106777.

It is an arithmetic number, because the mean of its divisors is an integer number (20106777).

Almost surely, 2^40213553 is an apocalyptic number.

It is an amenable number.

40213553 is a deficient number, since it is larger than the sum of its proper divisors (1).

40213553 is an equidigital number, since it uses as much as digits as its factorization.

40213553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 40213553 is about 6341.4156936760. The cubic root of 40213553 is about 342.6027269246.

Adding to 40213553 its reverse (35531204), we get a palindrome (75744757).

The spelling of 40213553 in words is "forty million, two hundred thirteen thousand, five hundred fifty-three".