2180981451 has 8 divisors (see below), whose sum is σ = 3172336704. Its totient is φ = 1321806920.

The previous prime is 2180981399. The next prime is 2180981461. The reversal of 2180981451 is 1541890812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2180981451 - 2¹⁰ = 2180980427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2180981461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33045141 + ... + 33045206.

It is an arithmetic number, because the mean of its divisors is an integer number (396542088).

Almost surely, 2^2180981451 is an apocalyptic number.

2180981451 is a deficient number, since it is larger than the sum of its proper divisors (991355253).

2180981451 is a wasteful number, since it uses less digits than its factorization.

2180981451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66090361.

The product of its (nonzero) digits is 23040, while the sum is 39.

The square root of 2180981451 is about 46700.9791224981. The cubic root of 2180981451 is about 1296.8328129353.

The spelling of 2180981451 in words is "two billion, one hundred eighty million, nine hundred eighty-one thousand, four hundred fifty-one".