75515213 has 2 divisors, whose sum is σ = 75515214. Its totient is φ = 75515212.

The previous prime is 75515203. The next prime is 75515227. The reversal of 75515213 is 31251557.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61512649 + 14002564 = 7843^2 + 3742^2 .

It is a cyclic number.

It is not a de Polignac number, because 75515213 - 2²⁴ = 58737997 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 (75515203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37757606 + 37757607.

It is an arithmetic number, because the mean of its divisors is an integer number (37757607).

Almost surely, 2^75515213 is an apocalyptic number.

It is an amenable number.

75515213 is a deficient number, since it is larger than the sum of its proper divisors (1).

75515213 is an equidigital number, since it uses as much as digits as its factorization.

75515213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5250, while the sum is 29.

The square root of 75515213 is about 8689.9489641769. The cubic root of 75515213 is about 422.6797908991.

The spelling of 75515213 in words is "seventy-five million, five hundred fifteen thousand, two hundred thirteen".