261431102 has 16 divisors (see below), whose sum is σ = 396876480. Its totient is φ = 129143808.

The previous prime is 261431101. The next prime is 261431123. The reversal of 261431102 is 201134162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261431101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200918 + ... + 202214.

It is an arithmetic number, because the mean of its divisors is an integer number (24804780).

Almost surely, 2^261431102 is an apocalyptic number.

261431102 is a deficient number, since it is larger than the sum of its proper divisors (135445378).

261431102 is a wasteful number, since it uses less digits than its factorization.

261431102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 261431102 is about 16168.8311884316. The cubic root of 261431102 is about 639.4193154152.

Adding to 261431102 its reverse (201134162), we get a palindrome (462565264).

The spelling of 261431102 in words is "two hundred sixty-one million, four hundred thirty-one thousand, one hundred two".