65050921 has 8 divisors (see below), whose sum is σ = 71948744. Its totient is φ = 58423680.

The previous prime is 65050913. The next prime is 65050933. The reversal of 65050921 is 12905056.

It can be written as a sum of positive squares in 4 ways, for example, as 17977600 + 47073321 = 4240^2 + 6861^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 65050921 - 2³ = 65050913 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65050921.

It is not an unprimeable number, because it can be changed into a prime (65056921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67140 + ... + 68101.

It is an arithmetic number, because the mean of its divisors is an integer number (8993593).

Almost surely, 2^65050921 is an apocalyptic number.

It is an amenable number.

65050921 is a deficient number, since it is larger than the sum of its proper divisors (6897823).

65050921 is a wasteful number, since it uses less digits than its factorization.

65050921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135291.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 65050921 is about 8065.4151164091. The cubic root of 65050921 is about 402.1775430052.

Adding to 65050921 its reverse (12905056), we get a palindrome (77955977).

The spelling of 65050921 in words is "sixty-five million, fifty thousand, nine hundred twenty-one".