31142401 has 2 divisors, whose sum is σ = 31142402. Its totient is φ = 31142400.

The previous prime is 31142393. The next prime is 31142413. The reversal of 31142401 is 10424113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31091776 + 50625 = 5576^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 31142401 - 2³ = 31142393 is a prime.

It is not a weakly prime, because it can be changed into another prime (31142431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571200 + 15571201.

It is an arithmetic number, because the mean of its divisors is an integer number (15571201).

Almost surely, 2^31142401 is an apocalyptic number.

It is an amenable number.

31142401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31142401 is an equidigital number, since it uses as much as digits as its factorization.

31142401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 31142401 is about 5580.5376981076. The cubic root of 31142401 is about 314.6183367782.

Adding to 31142401 its reverse (10424113), we get a palindrome (41566514).

The spelling of 31142401 in words is "thirty-one million, one hundred forty-two thousand, four hundred one".