4751622021 has 4 divisors (see below), whose sum is σ = 6335496032. Its totient is φ = 3167748012.

The previous prime is 4751622019. The next prime is 4751622133. The reversal of 4751622021 is 1202261574.

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 not a de Polignac number, because 4751622021 - 2¹ = 4751622019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4751622021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4751622521) 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, 791937001 + ... + 791937006.

It is an arithmetic number, because the mean of its divisors is an integer number (1583874008).

Almost surely, 2^4751622021 is an apocalyptic number.

It is an amenable number.

4751622021 is a deficient number, since it is larger than the sum of its proper divisors (1583874011).

4751622021 is a wasteful number, since it uses less digits than its factorization.

4751622021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583874010.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 4751622021 is about 68932.0101331740. The cubic root of 4751622021 is about 1681.1790217894.

Adding to 4751622021 its reverse (1202261574), we get a palindrome (5953883595).

The spelling of 4751622021 in words is "four billion, seven hundred fifty-one million, six hundred twenty-two thousand, twenty-one".