2187854401 has 2 divisors, whose sum is σ = 2187854402. Its totient is φ = 2187854400.

The previous prime is 2187854399. The next prime is 2187854467. The reversal of 2187854401 is 1044587812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1838351376 + 349503025 = 42876^2 + 18695^2 .

It is a cyclic number.

It is not a de Polignac number, because 2187854401 - 2¹ = 2187854399 is a prime.

Together with 2187854399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2187854701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093927200 + 1093927201.

It is an arithmetic number, because the mean of its divisors is an integer number (1093927201).

Almost surely, 2^2187854401 is an apocalyptic number.

It is an amenable number.

2187854401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2187854401 is an equidigital number, since it uses as much as digits as its factorization.

2187854401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 2187854401 is about 46774.5058872886. The cubic root of 2187854401 is about 1298.1936254906.

The spelling of 2187854401 in words is "two billion, one hundred eighty-seven million, eight hundred fifty-four thousand, four hundred one".