105721151 has 2 divisors, whose sum is σ = 105721152. Its totient is φ = 105721150.

The previous prime is 105721123. The next prime is 105721163. The reversal of 105721151 is 151127501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105721151 is a prime.

It is a super-2 number, since 2×105721151² = 22353923537529602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105721051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52860575 + 52860576.

It is an arithmetic number, because the mean of its divisors is an integer number (52860576).

Almost surely, 2^105721151 is an apocalyptic number.

105721151 is a deficient number, since it is larger than the sum of its proper divisors (1).

105721151 is an equidigital number, since it uses as much as digits as its factorization.

105721151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 350, while the sum is 23.

The square root of 105721151 is about 10282.0791185441. The cubic root of 105721151 is about 472.8469886653.

Adding to 105721151 its reverse (151127501), we get a palindrome (256848652).

The spelling of 105721151 in words is "one hundred five million, seven hundred twenty-one thousand, one hundred fifty-one".