103215961 has 4 divisors (see below), whose sum is σ = 108648400. Its totient is φ = 97783524.

The previous prime is 103215947. The next prime is 103215997. The reversal of 103215961 is 169512301.

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, and also an emirpimes, since its reverse is a distinct semiprime: 169512301 = 7 ⋅24216043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103215961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103225961) 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, 2716191 + ... + 2716228.

It is an arithmetic number, because the mean of its divisors is an integer number (27162100).

Almost surely, 2^103215961 is an apocalyptic number.

It is an amenable number.

103215961 is a deficient number, since it is larger than the sum of its proper divisors (5432439).

103215961 is an equidigital number, since it uses as much as digits as its factorization.

103215961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5432438.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 103215961 is about 10159.5256286896. The cubic root of 103215961 is about 469.0822001666.

The spelling of 103215961 in words is "one hundred three million, two hundred fifteen thousand, nine hundred sixty-one".