261824122 has 32 divisors (see below), whose sum is σ = 474232320. Its totient is φ = 106028160.

The previous prime is 261824117. The next prime is 261824149. The reversal of 261824122 is 221428162.

It is a super-2 number, since 2×261824122² = 137103741722141768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12222 + ... + 25942.

It is an arithmetic number, because the mean of its divisors is an integer number (14819760).

Almost surely, 2^261824122 is an apocalyptic number.

261824122 is a deficient number, since it is larger than the sum of its proper divisors (212408198).

261824122 is a wasteful number, since it uses less digits than its factorization.

261824122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13806.

The product of its digits is 3072, while the sum is 28.

The square root of 261824122 is about 16180.9802546076. The cubic root of 261824122 is about 639.7395766623.

The spelling of 261824122 in words is "two hundred sixty-one million, eight hundred twenty-four thousand, one hundred twenty-two".