16540253 has 2 divisors, whose sum is σ = 16540254. Its totient is φ = 16540252.

The previous prime is 16540229. The next prime is 16540259. The reversal of 16540253 is 35204561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15856324 + 683929 = 3982^2 + 827^2 .

It is a cyclic number.

It is not a de Polignac number, because 16540253 - 2⁶ = 16540189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16540259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8270126 + 8270127.

It is an arithmetic number, because the mean of its divisors is an integer number (8270127).

Almost surely, 2^16540253 is an apocalyptic number.

It is an amenable number.

16540253 is a deficient number, since it is larger than the sum of its proper divisors (1).

16540253 is an equidigital number, since it uses as much as digits as its factorization.

16540253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 16540253 is about 4066.9709858813. The cubic root of 16540253 is about 254.7890245226.

The spelling of 16540253 in words is "sixteen million, five hundred forty thousand, two hundred fifty-three".