8215106461 has 4 divisors (see below), whose sum is σ = 8215349632. Its totient is φ = 8214863292.

The previous prime is 8215106447. The next prime is 8215106467. The reversal of 8215106461 is 1646015128.

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 not a de Polignac number, because 8215106461 - 2²¹ = 8213009309 is a prime.

It is a super-3 number, since 3×8215106461³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8215106467) 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, 60771 + ... + 141856.

It is an arithmetic number, because the mean of its divisors is an integer number (2053837408).

Almost surely, 2^8215106461 is an apocalyptic number.

It is an amenable number.

8215106461 is a deficient number, since it is larger than the sum of its proper divisors (243171).

8215106461 is a wasteful number, since it uses less digits than its factorization.

8215106461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243170.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 8215106461 is about 90637.2244775843. The cubic root of 8215106461 is about 2017.7672337308.

The spelling of 8215106461 in words is "eight billion, two hundred fifteen million, one hundred six thousand, four hundred sixty-one".