65195531 has 4 divisors (see below), whose sum is σ = 66300600. Its totient is φ = 64090464.

The previous prime is 65195521. The next prime is 65195539. The reversal of 65195531 is 13559156.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65195531 is a prime.

It is a super-2 number, since 2×65195531² = 8500914524743922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65195491 and 65195500.

It is not an unprimeable number, because it can be changed into a prime (65195539) 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, 552446 + ... + 552563.

It is an arithmetic number, because the mean of its divisors is an integer number (16575150).

Almost surely, 2^65195531 is an apocalyptic number.

65195531 is a deficient number, since it is larger than the sum of its proper divisors (1105069).

65195531 is a wasteful number, since it uses less digits than its factorization.

65195531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105068.

The product of its digits is 20250, while the sum is 35.

The square root of 65195531 is about 8074.3749603297. The cubic root of 65195531 is about 402.4753397183.

The spelling of 65195531 in words is "sixty-five million, one hundred ninety-five thousand, five hundred thirty-one".