905221653 has 16 divisors (see below), whose sum is σ = 1381493376. Its totient is φ = 516479040.

The previous prime is 905221621. The next prime is 905221697. The reversal of 905221653 is 356122509.

It is not a de Polignac number, because 905221653 - 2⁵ = 905221621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905221153) 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, 18726 + ... + 46487.

It is an arithmetic number, because the mean of its divisors is an integer number (86343336).

Almost surely, 2^905221653 is an apocalyptic number.

It is an amenable number.

905221653 is a deficient number, since it is larger than the sum of its proper divisors (476271723).

905221653 is a wasteful number, since it uses less digits than its factorization.

905221653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65884.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 905221653 is about 30086.9016849525. The cubic root of 905221653 is about 967.3529890338.

The spelling of 905221653 in words is "nine hundred five million, two hundred twenty-one thousand, six hundred fifty-three".