31401043 has 2 divisors, whose sum is σ = 31401044. Its totient is φ = 31401042.

The previous prime is 31401037. The next prime is 31401061. The reversal of 31401043 is 34010413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31401043 - 2⁵ = 31401011 is a prime.

It is not a weakly prime, because it can be changed into another prime (31401743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700521 + 15700522.

It is an arithmetic number, because the mean of its divisors is an integer number (15700522).

Almost surely, 2^31401043 is an apocalyptic number.

31401043 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401043 is an equidigital number, since it uses as much as digits as its factorization.

31401043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31401043 is about 5603.6633553418. The cubic root of 31401043 is about 315.4869197404.

Adding to 31401043 its reverse (34010413), we get a palindrome (65411456).

The spelling of 31401043 in words is "thirty-one million, four hundred one thousand, forty-three".