261922130 has 16 divisors (see below), whose sum is σ = 477429120. Its totient is φ = 103442352.

The previous prime is 261922121. The next prime is 261922147. The reversal of 261922130 is 31229162.

It is a self number, because there is not a number n which added to its sum of digits gives 261922130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164984 + ... + 166563.

It is an arithmetic number, because the mean of its divisors is an integer number (29839320).

Almost surely, 2^261922130 is an apocalyptic number.

261922130 is a deficient number, since it is larger than the sum of its proper divisors (215506990).

261922130 is a wasteful number, since it uses less digits than its factorization.

261922130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331633.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 261922130 is about 16184.0084651486. The cubic root of 261922130 is about 639.8193907683.

The spelling of 261922130 in words is "two hundred sixty-one million, nine hundred twenty-two thousand, one hundred thirty".