261013814 has 4 divisors (see below), whose sum is σ = 391520724. Its totient is φ = 130506906.

The previous prime is 261013813. The next prime is 261013897. The reversal of 261013814 is 418310162.

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

It is a super-2 number, since 2×261013814² = 136256422197653192, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261013813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65253452 + ... + 65253455.

It is an arithmetic number, because the mean of its divisors is an integer number (97880181).

Almost surely, 2^261013814 is an apocalyptic number.

261013814 is a deficient number, since it is larger than the sum of its proper divisors (130506910).

261013814 is a wasteful number, since it uses less digits than its factorization.

261013814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130506909.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 261013814 is about 16155.9219483136. The cubic root of 261013814 is about 639.0789273288.

Adding to 261013814 its reverse (418310162), we get a palindrome (679323976).

The spelling of 261013814 in words is "two hundred sixty-one million, thirteen thousand, eight hundred fourteen".