261133092 has 48 divisors (see below), whose sum is σ = 738561600. Its totient is φ = 79130880.

The previous prime is 261133091. The next prime is 261133123. The reversal of 261133092 is 290331162.

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

It is not an unprimeable number, because it can be changed into a prime (261133091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108717 + ... + 111092.

It is an arithmetic number, because the mean of its divisors is an integer number (15386700).

Almost surely, 2^261133092 is an apocalyptic number.

261133092 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261133092 is an abundant number, since it is smaller than the sum of its proper divisors (477428508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261133092 is a wasteful number, since it uses less digits than its factorization.

261133092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219833 (or 219825 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 261133092 is about 16159.6129904153. The cubic root of 261133092 is about 639.1762611909.

The spelling of 261133092 in words is "two hundred sixty-one million, one hundred thirty-three thousand, ninety-two".