7221436401 has 16 divisors (see below), whose sum is σ = 10018992384. Its totient is φ = 4622951424.

The previous prime is 7221436367. The next prime is 7221436493. The reversal of 7221436401 is 1046341227.

It is not a de Polignac number, because 7221436401 - 2³⁰ = 6147694577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7221436601) 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, 475696 + ... + 490641.

It is an arithmetic number, because the mean of its divisors is an integer number (626187024).

Almost surely, 2^7221436401 is an apocalyptic number.

It is an amenable number.

7221436401 is a deficient number, since it is larger than the sum of its proper divisors (2797555983).

7221436401 is a wasteful number, since it uses less digits than its factorization.

7221436401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966440.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 7221436401 is about 84979.0350674800. The cubic root of 7221436401 is about 1932.8932239942.

Adding to 7221436401 its reverse (1046341227), we get a palindrome (8267777628).

The spelling of 7221436401 in words is "seven billion, two hundred twenty-one million, four hundred thirty-six thousand, four hundred one".