65213273 has 2 divisors, whose sum is σ = 65213274. Its totient is φ = 65213272.

The previous prime is 65213251. The next prime is 65213293. The reversal of 65213273 is 37231256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61418569 + 3794704 = 7837^2 + 1948^2 .

It is a cyclic number.

It is not a de Polignac number, because 65213273 - 2¹⁰ = 65212249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65213293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32606636 + 32606637.

It is an arithmetic number, because the mean of its divisors is an integer number (32606637).

Almost surely, 2^65213273 is an apocalyptic number.

It is an amenable number.

65213273 is a deficient number, since it is larger than the sum of its proper divisors (1).

65213273 is an equidigital number, since it uses as much as digits as its factorization.

65213273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 29.

The square root of 65213273 is about 8075.4735464863. The cubic root of 65213273 is about 402.5118456450.

It can be divided in two parts, 65 and 213273, that multiplied together give a triangular number (13862745 = T₅₂₆₅).

The spelling of 65213273 in words is "sixty-five million, two hundred thirteen thousand, two hundred seventy-three".