31345641 has 12 divisors (see below), whose sum is σ = 45364020. Its totient is φ = 20856960.

The previous prime is 31345627. The next prime is 31345669. The reversal of 31345641 is 14654313.

31345641 is a `hidden beast` number, since 3 + 13 + 4 + 5 + 641 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4347225 + 26998416 = 2085^2 + 5196^2 .

It is not a de Polignac number, because 31345641 - 2⁵ = 31345609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31345141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2061 + ... + 8181.

It is an arithmetic number, because the mean of its divisors is an integer number (3780335).

Almost surely, 2^31345641 is an apocalyptic number.

It is an amenable number.

31345641 is a deficient number, since it is larger than the sum of its proper divisors (14018379).

31345641 is a wasteful number, since it uses less digits than its factorization.

31345641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6696 (or 6693 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 31345641 is about 5598.7177996395. The cubic root of 31345641 is about 315.3012688392.

Adding to 31345641 its reverse (14654313), we get a palindrome (45999954).

It can be divided in two parts, 313 and 45641, that added together give a palindrome (45954).

The spelling of 31345641 in words is "thirty-one million, three hundred forty-five thousand, six hundred forty-one".