2181242512 has 10 divisors (see below), whose sum is σ = 4226157398. Its totient is φ = 1090621248.

The previous prime is 2181242501. The next prime is 2181242521. The reversal of 2181242512 is 2152421812.

It can be written as a sum of positive squares in only one way, i.e., 2086296976 + 94945536 = 45676^2 + 9744^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68163813 + ... + 68163844.

Almost surely, 2^2181242512 is an apocalyptic number.

It is an amenable number.

2181242512 is a deficient number, since it is larger than the sum of its proper divisors (2044914886).

2181242512 is a wasteful number, since it uses less digits than its factorization.

2181242512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136327665 (or 136327659 counting only the distinct ones).

The product of its digits is 2560, while the sum is 28.

The square root of 2181242512 is about 46703.7740659146. The cubic root of 2181242512 is about 1296.8845540087.

The spelling of 2181242512 in words is "two billion, one hundred eighty-one million, two hundred forty-two thousand, five hundred twelve".