351138261 has 8 divisors (see below), whose sum is σ = 471602304. Its totient is φ = 232383200.

The previous prime is 351138257. The next prime is 351138283. The reversal of 351138261 is 162831153.

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

It is a cyclic number.

It is not a de Polignac number, because 351138261 - 2² = 351138257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351138211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426765 + ... + 427586.

It is an arithmetic number, because the mean of its divisors is an integer number (58950288).

Almost surely, 2^351138261 is an apocalyptic number.

It is an amenable number.

351138261 is a deficient number, since it is larger than the sum of its proper divisors (120464043).

351138261 is a wasteful number, since it uses less digits than its factorization.

351138261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854491.

The product of its digits is 4320, while the sum is 30.

The square root of 351138261 is about 18738.6835450092. The cubic root of 351138261 is about 705.4930146378.

The spelling of 351138261 in words is "three hundred fifty-one million, one hundred thirty-eight thousand, two hundred sixty-one".