261265200131 has 8 divisors (see below), whose sum is σ = 283250864400. Its totient is φ = 239549298912.

The previous prime is 261265200109. The next prime is 261265200169. The reversal of 261265200131 is 131002562162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261265200131 - 2²⁶ = 261198091267 is a prime.

It is a super-2 number, since 2×261265200131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261265200094 and 261265200103.

It is not an unprimeable number, because it can be changed into a prime (261265200101) 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, 67438745 + ... + 67442618.

It is an arithmetic number, because the mean of its divisors is an integer number (35406358050).

Almost surely, 2^261265200131 is an apocalyptic number.

261265200131 is a deficient number, since it is larger than the sum of its proper divisors (21985664269).

261265200131 is a wasteful number, since it uses less digits than its factorization.

261265200131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134881525.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 261265200131 its reverse (131002562162), we get a palindrome (392267762293).

The spelling of 261265200131 in words is "two hundred sixty-one billion, two hundred sixty-five million, two hundred thousand, one hundred thirty-one".