21415167061 has 4 divisors (see below), whose sum is σ = 21509507232. Its totient is φ = 21320826892.

The previous prime is 21415167043. The next prime is 21415167097. The reversal of 21415167061 is 16076151412.

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 a de Polignac number, because none of the positive numbers 2^k-21415167061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21415167031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47169745 + ... + 47170198.

It is an arithmetic number, because the mean of its divisors is an integer number (5377376808).

Almost surely, 2^21415167061 is an apocalyptic number.

It is an amenable number.

21415167061 is a deficient number, since it is larger than the sum of its proper divisors (94340171).

21415167061 is an equidigital number, since it uses as much as digits as its factorization.

21415167061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94340170.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 21415167061 in words is "twenty-one billion, four hundred fifteen million, one hundred sixty-seven thousand, sixty-one".