261545022 has 48 divisors (see below), whose sum is σ = 575443440. Its totient is φ = 85844736.

The previous prime is 261545021. The next prime is 261545059. The reversal of 261545022 is 220545162.

261545022 is a `hidden beast` number, since 2 + 6 + 154 + 502 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261545021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440758 + ... + 441350.

It is an arithmetic number, because the mean of its divisors is an integer number (11988405).

Almost surely, 2^261545022 is an apocalyptic number.

261545022 is an abundant number, since it is smaller than the sum of its proper divisors (313898418).

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

261545022 is a wasteful number, since it uses less digits than its factorization.

261545022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 261545022 is about 16172.3536320475. The cubic root of 261545022 is about 639.5121787227.

The spelling of 261545022 in words is "two hundred sixty-one million, five hundred forty-five thousand, twenty-two".