4953651221 has 4 divisors (see below), whose sum is σ = 4958312352. Its totient is φ = 4948990092.

The previous prime is 4953651179. The next prime is 4953651223. The reversal of 4953651221 is 1221563594.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4953651221 - 2²⁶ = 4886542357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4953651223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2328971 + ... + 2331096.

It is an arithmetic number, because the mean of its divisors is an integer number (1239578088).

Almost surely, 2^4953651221 is an apocalyptic number.

It is an amenable number.

4953651221 is a deficient number, since it is larger than the sum of its proper divisors (4661131).

4953651221 is a wasteful number, since it uses less digits than its factorization.

4953651221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4661130.

The product of its digits is 64800, while the sum is 38.

The square root of 4953651221 is about 70382.1797119129. The cubic root of 4953651221 is about 1704.6758494317.

The spelling of 4953651221 in words is "four billion, nine hundred fifty-three million, six hundred fifty-one thousand, two hundred twenty-one".