351525661 has 4 divisors (see below), whose sum is σ = 352776924. Its totient is φ = 350274400.

The previous prime is 351525659. The next prime is 351525689. The reversal of 351525661 is 166525153.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84824100 + 266701561 = 9210^2 + 16331^2 .

It is a cyclic number.

It is not a de Polignac number, because 351525661 - 2¹ = 351525659 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 (351525611) 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, 625210 + ... + 625771.

It is an arithmetic number, because the mean of its divisors is an integer number (88194231).

Almost surely, 2^351525661 is an apocalyptic number.

It is an amenable number.

351525661 is a deficient number, since it is larger than the sum of its proper divisors (1251263).

351525661 is a wasteful number, since it uses less digits than its factorization.

351525661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251262.

The product of its digits is 27000, while the sum is 34.

The square root of 351525661 is about 18749.0176009305. The cubic root of 351525661 is about 705.7523688343.

The spelling of 351525661 in words is "three hundred fifty-one million, five hundred twenty-five thousand, six hundred sixty-one".