31443101 has 4 divisors (see below), whose sum is σ = 31556892. Its totient is φ = 31329312.

The previous prime is 31443091. The next prime is 31443133. The reversal of 31443101 is 10134413.

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 15202201 + 16240900 = 3899^2 + 4030^2 .

It is a cyclic number.

It is not a de Polignac number, because 31443101 - 2⁶ = 31443037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31443101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56480 + ... + 57033.

It is an arithmetic number, because the mean of its divisors is an integer number (7889223).

Almost surely, 2^31443101 is an apocalyptic number.

It is an amenable number.

31443101 is a deficient number, since it is larger than the sum of its proper divisors (113791).

31443101 is a wasteful number, since it uses less digits than its factorization.

31443101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113790.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31443101 is about 5607.4148232497. The cubic root of 31443101 is about 315.6277094301.

Adding to 31443101 its reverse (10134413), we get a palindrome (41577514).

The spelling of 31443101 in words is "thirty-one million, four hundred forty-three thousand, one hundred one".