65021630 has 8 divisors (see below), whose sum is σ = 117038952. Its totient is φ = 26008648.

The previous prime is 65021603. The next prime is 65021647. The reversal of 65021630 is 3612056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 65021596 and 65021605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3251072 + ... + 3251091.

It is an arithmetic number, because the mean of its divisors is an integer number (14629869).

Almost surely, 2^65021630 is an apocalyptic number.

65021630 is a deficient number, since it is larger than the sum of its proper divisors (52017322).

65021630 is a wasteful number, since it uses less digits than its factorization.

65021630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6502170.

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

The square root of 65021630 is about 8063.5990723746. The cubic root of 65021630 is about 402.1171700400.

Adding to 65021630 its reverse (3612056), we get a palindrome (68633686).

The spelling of 65021630 in words is "sixty-five million, twenty-one thousand, six hundred thirty".