65151240 has 192 divisors, whose sum is σ = 245911680. Its totient is φ = 13516800.

The previous prime is 65151211. The next prime is 65151271. The reversal of 65151240 is 4215156.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 65151240.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101320 + ... + 101960.

It is an arithmetic number, because the mean of its divisors is an integer number (1280790).

Almost surely, 2^65151240 is an apocalyptic number.

65151240 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 65151240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122955840).

65151240 is an abundant number, since it is smaller than the sum of its proper divisors (180760440).

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

65151240 is a wasteful number, since it uses less digits than its factorization.

65151240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 65151240 is about 8071.6318052795. The cubic root of 65151240 is about 402.3841776746.

Adding to 65151240 its reverse (4215156), we get a palindrome (69366396).

The spelling of 65151240 in words is "sixty-five million, one hundred fifty-one thousand, two hundred forty".