65213487 has 24 divisors (see below), whose sum is σ = 100399104. Its totient is φ = 40694544.

The previous prime is 65213437. The next prime is 65213497. The reversal of 65213487 is 78431256.

It is a de Polignac number, because none of the positive numbers 2^k-65213487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65213437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6378 + ... + 13080.

It is an arithmetic number, because the mean of its divisors is an integer number (4183296).

Almost surely, 2^65213487 is an apocalyptic number.

65213487 is a deficient number, since it is larger than the sum of its proper divisors (35185617).

65213487 is a wasteful number, since it uses less digits than its factorization.

65213487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6779 (or 6776 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 65213487 is about 8075.4867964724. The cubic root of 65213487 is about 402.5122859308.

The spelling of 65213487 in words is "sixty-five million, two hundred thirteen thousand, four hundred eighty-seven".