100215649 has 2 divisors, whose sum is σ = 100215650. Its totient is φ = 100215648.

The previous prime is 100215617. The next prime is 100215679. The reversal of 100215649 is 946512001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99201600 + 1014049 = 9960^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 100215649 - 2⁵ = 100215617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100215679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50107824 + 50107825.

It is an arithmetic number, because the mean of its divisors is an integer number (50107825).

Almost surely, 2^100215649 is an apocalyptic number.

It is an amenable number.

100215649 is a deficient number, since it is larger than the sum of its proper divisors (1).

100215649 is an equidigital number, since it uses as much as digits as its factorization.

100215649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 100215649 is about 10010.7766431981. The cubic root of 100215649 is about 464.4922951397.

The spelling of 100215649 in words is "one hundred million, two hundred fifteen thousand, six hundred forty-nine".