261448015 has 16 divisors (see below), whose sum is σ = 346638528. Its totient is φ = 188294656.

The previous prime is 261448001. The next prime is 261448043. The reversal of 261448015 is 510844162.

It is a cyclic number.

It is not a de Polignac number, because 261448015 - 2⁵ = 261447983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64912 + ... + 68821.

It is an arithmetic number, because the mean of its divisors is an integer number (21664908).

Almost surely, 2^261448015 is an apocalyptic number.

261448015 is a deficient number, since it is larger than the sum of its proper divisors (85190513).

261448015 is a wasteful number, since it uses less digits than its factorization.

261448015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133778.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 261448015 is about 16169.3541924222. The cubic root of 261448015 is about 639.4331039629.

The spelling of 261448015 in words is "two hundred sixty-one million, four hundred forty-eight thousand, fifteen".