65331420 has 192 divisors, whose sum is σ = 232243200. Its totient is φ = 13328640.

The previous prime is 65331401. The next prime is 65331421. The reversal of 65331420 is 2413356.

It is a happy number.

It is a super-3 number, since 3×65331420³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65331421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 364891 + ... + 365069.

It is an arithmetic number, because the mean of its divisors is an integer number (1209600).

Almost surely, 2^65331420 is an apocalyptic number.

65331420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65331420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116121600).

65331420 is an abundant number, since it is smaller than the sum of its proper divisors (166911780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65331420 is a wasteful number, since it uses less digits than its factorization.

65331420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 65331420 is about 8082.7854109830. The cubic root of 65331420 is about 402.7547761348.

Adding to 65331420 its reverse (2413356), we get a palindrome (67744776).

The spelling of 65331420 in words is "sixty-five million, three hundred thirty-one thousand, four hundred twenty".