2162512421 has 4 divisors (see below), whose sum is σ = 2289719052. Its totient is φ = 2035305792.

The previous prime is 2162512409. The next prime is 2162512423. The reversal of 2162512421 is 1242152612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1338535396 + 823977025 = 36586^2 + 28705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2162512421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162512423) 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, 63603290 + ... + 63603323.

It is an arithmetic number, because the mean of its divisors is an integer number (572429763).

Almost surely, 2^2162512421 is an apocalyptic number.

It is an amenable number.

2162512421 is a deficient number, since it is larger than the sum of its proper divisors (127206631).

2162512421 is a wasteful number, since it uses less digits than its factorization.

2162512421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127206630.

The product of its digits is 1920, while the sum is 26.

The square root of 2162512421 is about 46502.8216455733. The cubic root of 2162512421 is about 1293.1618093569.

The spelling of 2162512421 in words is "two billion, one hundred sixty-two million, five hundred twelve thousand, four hundred twenty-one".