261151472 has 20 divisors (see below), whose sum is σ = 506254800. Its totient is φ = 130505088.

The previous prime is 261151463. The next prime is 261151477. The reversal of 261151472 is 274151162.

261151472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261151477) 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, 39029 + ... + 45227.

It is an arithmetic number, because the mean of its divisors is an integer number (25312740).

Almost surely, 2^261151472 is an apocalyptic number.

It is an amenable number.

261151472 is a deficient number, since it is larger than the sum of its proper divisors (245103328).

261151472 is a wasteful number, since it uses less digits than its factorization.

261151472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8840 (or 8834 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 261151472 is about 16160.1816821470. The cubic root of 261151472 is about 639.1912570996.

The spelling of 261151472 in words is "two hundred sixty-one million, one hundred fifty-one thousand, four hundred seventy-two".