2801232261 has 32 divisors (see below), whose sum is σ = 4470128640. Its totient is φ = 1728658800.

The previous prime is 2801232209. The next prime is 2801232271. The reversal of 2801232261 is 1622321082.

2801232261 is a `hidden beast` number, since 280 + 1 + 2 + 322 + 61 = 666.

It is not a de Polignac number, because 2801232261 - 2⁶ = 2801232197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2801232271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53505 + ... + 92006.

It is an arithmetic number, because the mean of its divisors is an integer number (139691520).

Almost surely, 2^2801232261 is an apocalyptic number.

It is an amenable number.

2801232261 is a deficient number, since it is larger than the sum of its proper divisors (1668896379).

2801232261 is a wasteful number, since it uses less digits than its factorization.

2801232261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145574 (or 145568 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2801232261 is about 52926.6687124742. The cubic root of 2801232261 is about 1409.6664806452. Note that the first 3 decimals are identical.

The spelling of 2801232261 in words is "two billion, eight hundred one million, two hundred thirty-two thousand, two hundred sixty-one".