21275217341 has 18 divisors (see below), whose sum is σ = 26290182618. Its totient is φ = 17163189120.

The previous prime is 21275217317. The next prime is 21275217347. The reversal of 21275217341 is 14371257212.

It can be written as a sum of positive squares in 3 ways, for example, as 6091802500 + 15183414841 = 78050^2 + 123221^2 .

It is not a de Polignac number, because 21275217341 - 2³⁴ = 4095348157 is a prime.

It is a super-2 number, since 2×21275217341² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21275217347) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 737030 + ... + 765351.

It is an arithmetic number, because the mean of its divisors is an integer number (1460565701).

Almost surely, 2^21275217341 is an apocalyptic number.

It is an amenable number.

21275217341 is a deficient number, since it is larger than the sum of its proper divisors (5014965277).

21275217341 is a wasteful number, since it uses less digits than its factorization.

21275217341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502429 (or 1502405 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The spelling of 21275217341 in words is "twenty-one billion, two hundred seventy-five million, two hundred seventeen thousand, three hundred forty-one".