261563150 has 12 divisors (see below), whose sum is σ = 486507552. Its totient is φ = 104625240.

The previous prime is 261563123. The next prime is 261563179. The reversal of 261563150 is 51365162.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2615582 + ... + 2615681.

It is an arithmetic number, because the mean of its divisors is an integer number (40542296).

Almost surely, 2^261563150 is an apocalyptic number.

261563150 is a deficient number, since it is larger than the sum of its proper divisors (224944402).

261563150 is a wasteful number, since it uses less digits than its factorization.

261563150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231275 (or 5231270 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 261563150 is about 16172.9140849755. The cubic root of 261563150 is about 639.5269535007.

The spelling of 261563150 in words is "two hundred sixty-one million, five hundred sixty-three thousand, one hundred fifty".