2181150481 has 4 divisors (see below), whose sum is σ = 2240100532. Its totient is φ = 2122200432.

The previous prime is 2181150469. The next prime is 2181150493. The reversal of 2181150481 is 1840511812.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2181150469) and next prime (2181150493).

It can be written as a sum of positive squares in 2 ways, for example, as 1549130881 + 632019600 = 39359^2 + 25140^2 .

It is a cyclic number.

It is not a de Polignac number, because 2181150481 - 2²¹ = 2179053329 is a prime.

It is a super-2 number, since 2×2181150481² = 9514834841533062722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181150401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29474970 + ... + 29475043.

It is an arithmetic number, because the mean of its divisors is an integer number (560025133).

Almost surely, 2^2181150481 is an apocalyptic number.

It is an amenable number.

2181150481 is a deficient number, since it is larger than the sum of its proper divisors (58950051).

2181150481 is an equidigital number, since it uses as much as digits as its factorization.

2181150481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58950050.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 2181150481 is about 46702.7887925336. The cubic root of 2181150481 is about 1296.8663143646.

The spelling of 2181150481 in words is "two billion, one hundred eighty-one million, one hundred fifty thousand, four hundred eighty-one".