5181401887 has 2 divisors, whose sum is σ = 5181401888. Its totient is φ = 5181401886.

The previous prime is 5181401881. The next prime is 5181401891. The reversal of 5181401887 is 7881041815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5181401887 - 2¹⁵ = 5181369119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5181401881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590700943 + 2590700944.

It is an arithmetic number, because the mean of its divisors is an integer number (2590700944).

Almost surely, 2^5181401887 is an apocalyptic number.

5181401887 is a deficient number, since it is larger than the sum of its proper divisors (1).

5181401887 is an equidigital number, since it uses as much as digits as its factorization.

5181401887 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 43.

The square root of 5181401887 is about 71981.9552874191. The cubic root of 5181401887 is about 1730.4103058561.

The spelling of 5181401887 in words is "five billion, one hundred eighty-one million, four hundred one thousand, eight hundred eighty-seven".