345251661 has 4 divisors (see below), whose sum is σ = 460335552. Its totient is φ = 230167772.

The previous prime is 345251653. The next prime is 345251663. The reversal of 345251661 is 166152543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 345251661 - 2³ = 345251653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345251663) 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, 57541941 + ... + 57541946.

It is an arithmetic number, because the mean of its divisors is an integer number (115083888).

Almost surely, 2^345251661 is an apocalyptic number.

It is an amenable number.

345251661 is a deficient number, since it is larger than the sum of its proper divisors (115083891).

345251661 is a wasteful number, since it uses less digits than its factorization.

345251661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115083890.

The product of its digits is 21600, while the sum is 33.

The square root of 345251661 is about 18580.9488724338. The cubic root of 345251661 is about 701.5284025845.

The spelling of 345251661 in words is "three hundred forty-five million, two hundred fifty-one thousand, six hundred sixty-one".