31400041 has 4 divisors (see below), whose sum is σ = 31411584. Its totient is φ = 31388500.

The previous prime is 31400029. The next prime is 31400053. The reversal of 31400041 is 14000413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (31400029) and next prime (31400053).

It is a cyclic number.

It is not a de Polignac number, because 31400041 - 2¹⁷ = 31268969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31399994 and 31400030.

It is not an unprimeable number, because it can be changed into a prime (31400021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816 + ... + 7966.

It is an arithmetic number, because the mean of its divisors is an integer number (7852896).

Almost surely, 2^31400041 is an apocalyptic number.

It is an amenable number.

31400041 is a deficient number, since it is larger than the sum of its proper divisors (11543).

31400041 is an equidigital number, since it uses as much as digits as its factorization.

31400041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11542.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 31400041 is about 5603.5739488294. The cubic root of 31400041 is about 315.4835639999.

Adding to 31400041 its reverse (14000413), we get a palindrome (45400454).

The spelling of 31400041 in words is "thirty-one million, four hundred thousand, forty-one".