261215346 has 32 divisors (see below), whose sum is σ = 611630208. Its totient is φ = 72812160.

The previous prime is 261215341. The next prime is 261215351. The reversal of 261215346 is 643512162.

It is an interprime number because it is at equal distance from previous prime (261215341) and next prime (261215351).

It is not an unprimeable number, because it can be changed into a prime (261215341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74125 + ... + 77568.

It is an arithmetic number, because the mean of its divisors is an integer number (19113444).

Almost surely, 2^261215346 is an apocalyptic number.

261215346 is an abundant number, since it is smaller than the sum of its proper divisors (350414862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261215346 is a wasteful number, since it uses less digits than its factorization.

261215346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151746.

The product of its digits is 8640, while the sum is 30.

The square root of 261215346 is about 16162.1578386056. The cubic root of 261215346 is about 639.2433652674.

The spelling of 261215346 in words is "two hundred sixty-one million, two hundred fifteen thousand, three hundred forty-six".