7218734901 has 16 divisors (see below), whose sum is σ = 11186419200. Its totient is φ = 4055075568.

The previous prime is 7218734899. The next prime is 7218734917. The reversal of 7218734901 is 1094378127.

It is not a de Polignac number, because 7218734901 - 2¹ = 7218734899 is a prime.

It is a super-2 number, since 2×7218734901² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218734981) 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 15 ways as a sum of consecutive naturals, for example, 2911891 + ... + 2914368.

It is an arithmetic number, because the mean of its divisors is an integer number (699151200).

Almost surely, 2^7218734901 is an apocalyptic number.

It is an amenable number.

7218734901 is a deficient number, since it is larger than the sum of its proper divisors (3967684299).

7218734901 is a wasteful number, since it uses less digits than its factorization.

7218734901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5826328.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 7218734901 is about 84963.1384836977. The cubic root of 7218734901 is about 1932.6521656586.

The spelling of 7218734901 in words is "seven billion, two hundred eighteen million, seven hundred thirty-four thousand, nine hundred one".