261513346 has 8 divisors (see below), whose sum is σ = 415344780. Its totient is φ = 123065088.

The previous prime is 261513331. The next prime is 261513347. The reversal of 261513346 is 643315162.

It can be written as a sum of positive squares in 2 ways, for example, as 235960321 + 25553025 = 15361^2 + 5055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×261513346² = 136778460272231432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261513347) 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, 3845751 + ... + 3845818.

Almost surely, 2^261513346 is an apocalyptic number.

261513346 is a deficient number, since it is larger than the sum of its proper divisors (153831434).

261513346 is a wasteful number, since it uses less digits than its factorization.

261513346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7691588.

The product of its digits is 12960, while the sum is 31.

The square root of 261513346 is about 16171.3742767892. The cubic root of 261513346 is about 639.4863603436.

The spelling of 261513346 in words is "two hundred sixty-one million, five hundred thirteen thousand, three hundred forty-six".