65213961 has 4 divisors (see below), whose sum is σ = 86951952. Its totient is φ = 43475972.

The previous prime is 65213959. The next prime is 65213963. The reversal of 65213961 is 16931256.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (65213959) and next prime (65213963).

It is a cyclic number.

It is not a de Polignac number, because 65213961 - 2¹ = 65213959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65213963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10868991 + ... + 10868996.

It is an arithmetic number, because the mean of its divisors is an integer number (21737988).

Almost surely, 2^65213961 is an apocalyptic number.

It is an amenable number.

65213961 is a deficient number, since it is larger than the sum of its proper divisors (21737991).

65213961 is a wasteful number, since it uses less digits than its factorization.

65213961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21737990.

The product of its digits is 9720, while the sum is 33.

The square root of 65213961 is about 8075.5161444950. The cubic root of 65213961 is about 402.5132611399.

The spelling of 65213961 in words is "sixty-five million, two hundred thirteen thousand, nine hundred sixty-one".