215526422461 has 24 divisors (see below), whose sum is σ = 265493479680. Its totient is φ = 171290141856.

The previous prime is 215526422459. The next prime is 215526422473. The reversal of 215526422461 is 164224625512.

It is not a de Polignac number, because 215526422461 - 2¹ = 215526422459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215526422411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 788566 + ... + 1026103.

It is an arithmetic number, because the mean of its divisors is an integer number (11062228320).

Almost surely, 2^215526422461 is an apocalyptic number.

It is an amenable number.

215526422461 is a deficient number, since it is larger than the sum of its proper divisors (49967057219).

215526422461 is a wasteful number, since it uses less digits than its factorization.

215526422461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814761 (or 1814742 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The spelling of 215526422461 in words is "two hundred fifteen billion, five hundred twenty-six million, four hundred twenty-two thousand, four hundred sixty-one".