105215651 has 2 divisors, whose sum is σ = 105215652. Its totient is φ = 105215650.

The previous prime is 105215573. The next prime is 105215689. The reversal of 105215651 is 156512501.

It is a strong prime.

It is an emirp because it is prime and its reverse (156512501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105215651 - 2²⁶ = 38106787 is a prime.

It is a super-2 number, since 2×105215651² = 22140666430707602, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 105215651.

It is not a weakly prime, because it can be changed into another prime (105215051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52607825 + 52607826.

It is an arithmetic number, because the mean of its divisors is an integer number (52607826).

Almost surely, 2^105215651 is an apocalyptic number.

105215651 is a deficient number, since it is larger than the sum of its proper divisors (1).

105215651 is an equidigital number, since it uses as much as digits as its factorization.

105215651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 105215651 is about 10257.4680599064. The cubic root of 105215651 is about 472.0921534972.

The spelling of 105215651 in words is "one hundred five million, two hundred fifteen thousand, six hundred fifty-one".