261655022 has 8 divisors (see below), whose sum is σ = 398010672. Its totient is φ = 128984800.

The previous prime is 261655021. The next prime is 261655073. The reversal of 261655022 is 220556162.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261655021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921179 + ... + 921462.

It is an arithmetic number, because the mean of its divisors is an integer number (49751334).

Almost surely, 2^261655022 is an apocalyptic number.

261655022 is a deficient number, since it is larger than the sum of its proper divisors (136355650).

261655022 is a wasteful number, since it uses less digits than its factorization.

261655022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842714.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 261655022 is about 16175.7541400703. The cubic root of 261655022 is about 639.6018210073.

The spelling of 261655022 in words is "two hundred sixty-one million, six hundred fifty-five thousand, twenty-two".