65401331 has 4 divisors (see below), whose sum is σ = 65740392. Its totient is φ = 65062272.

The previous prime is 65401327. The next prime is 65401337. The reversal of 65401331 is 13310456.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65401331 - 2² = 65401327 is a prime.

It is a super-2 number, since 2×65401331² = 8554668193143122, 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 = 65401297 and 65401306.

It is not an unprimeable number, because it can be changed into a prime (65401337) 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, 169241 + ... + 169626.

It is an arithmetic number, because the mean of its divisors is an integer number (16435098).

Almost surely, 2^65401331 is an apocalyptic number.

65401331 is a deficient number, since it is larger than the sum of its proper divisors (339061).

65401331 is a wasteful number, since it uses less digits than its factorization.

65401331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339060.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 65401331 is about 8087.1089395408. The cubic root of 65401331 is about 402.8983872362.

Adding to 65401331 its reverse (13310456), we get a palindrome (78711787).

The spelling of 65401331 in words is "sixty-five million, four hundred one thousand, three hundred thirty-one".