2500181881 has 2 divisors, whose sum is σ = 2500181882. Its totient is φ = 2500181880.

The previous prime is 2500181867. The next prime is 2500181897. The reversal of 2500181881 is 1881810052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2446291600 + 53890281 = 49460^2 + 7341^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500181881 - 2¹⁹ = 2499657593 is a prime.

It is a super-2 number, since 2×2500181881² = 12501818876161396322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2500181821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250090940 + 1250090941.

It is an arithmetic number, because the mean of its divisors is an integer number (1250090941).

Almost surely, 2^2500181881 is an apocalyptic number.

It is an amenable number.

2500181881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500181881 is an equidigital number, since it uses as much as digits as its factorization.

2500181881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 34.

The square root of 2500181881 is about 50001.8187769205. The cubic root of 2500181881 is about 1357.2417208987.

The spelling of 2500181881 in words is "two billion, five hundred million, one hundred eighty-one thousand, eight hundred eighty-one".