7214633721 has 27 divisors (see below), whose sum is σ = 10902787077. Its totient is φ = 4596898680.

The previous prime is 7214633711. The next prime is 7214633729. The reversal of 7214633721 is 1273364127.

The square root of 7214633721 is 84939.

It is a perfect power (a square), and thus also a powerful number.

7214633721 is a `hidden beast` number, since 7 + 2 + 14 + 633 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 7214633721 - 2¹¹ = 7214631673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7214633729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5860176 + ... + 5861406.

Almost surely, 2^7214633721 is an apocalyptic number.

7214633721 is the 84939-th square number.

7214633721 is the 42470-th centered octagonal number.

It is an amenable number.

7214633721 is a deficient number, since it is larger than the sum of its proper divisors (3688153356).

7214633721 is an equidigital number, since it uses as much as digits as its factorization.

7214633721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514 (or 1257 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The cubic root of 7214633721 is about 1932.2860970875.

Multiplying 7214633721 by its sum of digits (36), we get a square (259726813956 = 509634²).

Adding to 7214633721 its reverse (1273364127), we get a palindrome (8487997848).

The spelling of 7214633721 in words is "seven billion, two hundred fourteen million, six hundred thirty-three thousand, seven hundred twenty-one".