1400031221 has 4 divisors (see below), whose sum is σ = 1400464332. Its totient is φ = 1399598112.

The previous prime is 1400031211. The next prime is 1400031239. The reversal of 1400031221 is 1221300041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1189491121 + 210540100 = 34489^2 + 14510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400031221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400031196 and 1400031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400031211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211670 + ... + 218183.

It is an arithmetic number, because the mean of its divisors is an integer number (350116083).

Almost surely, 2^1400031221 is an apocalyptic number.

It is an amenable number.

1400031221 is a deficient number, since it is larger than the sum of its proper divisors (433111).

1400031221 is an equidigital number, since it uses as much as digits as its factorization.

1400031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433110.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1400031221 is about 37416.9910735751. The cubic root of 1400031221 is about 1118.6972578737.

Adding to 1400031221 its reverse (1221300041), we get a palindrome (2621331262).

The spelling of 1400031221 in words is "one billion, four hundred million, thirty-one thousand, two hundred twenty-one".