261446351 has 4 divisors (see below), whose sum is σ = 263327400. Its totient is φ = 259565304.

The previous prime is 261446333. The next prime is 261446389. The reversal of 261446351 is 153644162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261446351 - 2²⁶ = 194337487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261446851) 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, 940316 + ... + 940593.

It is an arithmetic number, because the mean of its divisors is an integer number (65831850).

Almost surely, 2^261446351 is an apocalyptic number.

261446351 is a deficient number, since it is larger than the sum of its proper divisors (1881049).

261446351 is a wasteful number, since it uses less digits than its factorization.

261446351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881048.

The product of its digits is 17280, while the sum is 32.

The square root of 261446351 is about 16169.3027369766. The cubic root of 261446351 is about 639.4317473912.

The spelling of 261446351 in words is "two hundred sixty-one million, four hundred forty-six thousand, three hundred fifty-one".