65815452 has 36 divisors (see below), whose sum is σ = 170866696. Its totient is φ = 21345120.

The previous prime is 65815447. The next prime is 65815457. The reversal of 65815452 is 25451856.

It is an interprime number because it is at equal distance from previous prime (65815447) and next prime (65815457).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65815457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23374 + ... + 26037.

Almost surely, 2^65815452 is an apocalyptic number.

It is an amenable number.

65815452 is an abundant number, since it is smaller than the sum of its proper divisors (105051244).

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

65815452 is a wasteful number, since it uses less digits than its factorization.

65815452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49458 (or 49453 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 65815452 is about 8112.6723094181. The cubic root of 65815452 is about 403.7469823761.

It can be divided in two parts, 658 and 15452, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 65815452 in words is "sixty-five million, eight hundred fifteen thousand, four hundred fifty-two".