2181148245 has 12 divisors (see below), whose sum is σ = 3780657036. Its totient is φ = 1163279040.

The previous prime is 2181148231. The next prime is 2181148247. The reversal of 2181148245 is 5428411812.

It can be written as a sum of positive squares in 2 ways, for example, as 621056241 + 1560092004 = 24921^2 + 39498^2 .

It is not a de Polignac number, because 2181148245 - 2⁸ = 2181147989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181148247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24234936 + ... + 24235025.

It is an arithmetic number, because the mean of its divisors is an integer number (315054753).

Almost surely, 2^2181148245 is an apocalyptic number.

It is an amenable number.

2181148245 is a deficient number, since it is larger than the sum of its proper divisors (1599508791).

2181148245 is a wasteful number, since it uses less digits than its factorization.

2181148245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48469972 (or 48469969 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 2181148245 is about 46702.7648539142. The cubic root of 2181148245 is about 1296.8658712049.

It can be divided in two parts, 2181 and 148245, that added together give a triangular number (150426 = T₅₄₈).

The spelling of 2181148245 in words is "two billion, one hundred eighty-one million, one hundred forty-eight thousand, two hundred forty-five".