261713133 has 32 divisors (see below), whose sum is σ = 427766400. Its totient is φ = 156816000.

The previous prime is 261713131. The next prime is 261713161. The reversal of 261713133 is 331317162.

261713133 is a `hidden beast` number, since 2 + 617 + 13 + 1 + 33 = 666.

It is not a de Polignac number, because 261713133 - 2¹ = 261713131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 261713097 and 261713106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261713131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21483 + ... + 31383.

It is an arithmetic number, because the mean of its divisors is an integer number (13367700).

Almost surely, 2^261713133 is an apocalyptic number.

It is an amenable number.

261713133 is a deficient number, since it is larger than the sum of its proper divisors (166053267).

261713133 is a wasteful number, since it uses less digits than its factorization.

261713133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010 (or 10004 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 261713133 is about 16177.5502780860. The cubic root of 261713133 is about 639.6491672548.

The spelling of 261713133 in words is "two hundred sixty-one million, seven hundred thirteen thousand, one hundred thirty-three".