31052161 has 4 divisors (see below), whose sum is σ = 35488192. Its totient is φ = 26616132.

The previous prime is 31052123. The next prime is 31052167. The reversal of 31052161 is 16125013.

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.

It is a cyclic number.

It is not a de Polignac number, because 31052161 - 2⁹ = 31051649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31052167) 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, 2218005 + ... + 2218018.

It is an arithmetic number, because the mean of its divisors is an integer number (8872048).

Almost surely, 2^31052161 is an apocalyptic number.

It is an amenable number.

31052161 is a deficient number, since it is larger than the sum of its proper divisors (4436031).

31052161 is an equidigital number, since it uses as much as digits as its factorization.

31052161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436030.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 31052161 is about 5572.4465901433. The cubic root of 31052161 is about 314.3141574317.

Adding to 31052161 its reverse (16125013), we get a palindrome (47177174).

It can be divided in two parts, 31052 and 161, that added together give a palindrome (31213).

The spelling of 31052161 in words is "thirty-one million, fifty-two thousand, one hundred sixty-one".