261156022 has 8 divisors (see below), whose sum is σ = 391945176. Its totient is φ = 130507632.

The previous prime is 261156013. The next prime is 261156029. The reversal of 261156022 is 220651162.

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 (261156029) 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, 30423 + ... + 38050.

It is an arithmetic number, because the mean of its divisors is an integer number (48993147).

Almost surely, 2^261156022 is an apocalyptic number.

261156022 is a deficient number, since it is larger than the sum of its proper divisors (130789154).

261156022 is a wasteful number, since it uses less digits than its factorization.

261156022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70382.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 261156022 is about 16160.3224596541. The cubic root of 261156022 is about 639.1949692535.

The spelling of 261156022 in words is "two hundred sixty-one million, one hundred fifty-six thousand, twenty-two".