65221429 has 16 divisors (see below), whose sum is σ = 81793152. Its totient is φ = 50626368.

The previous prime is 65221423. The next prime is 65221439. The reversal of 65221429 is 92412256.

It is not a de Polignac number, because 65221429 - 2⁵ = 65221397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65221429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65221423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1939 + ... + 11584.

It is an arithmetic number, because the mean of its divisors is an integer number (5112072).

Almost surely, 2^65221429 is an apocalyptic number.

It is an amenable number.

65221429 is a deficient number, since it is larger than the sum of its proper divisors (16571723).

65221429 is a wasteful number, since it uses less digits than its factorization.

65221429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13596.

The product of its digits is 8640, while the sum is 31.

The square root of 65221429 is about 8075.9785165638. The cubic root of 65221429 is about 402.5286252033.

The spelling of 65221429 in words is "sixty-five million, two hundred twenty-one thousand, four hundred twenty-nine".