351573661 has 2 divisors, whose sum is σ = 351573662. Its totient is φ = 351573660.

The previous prime is 351573643. The next prime is 351573679. The reversal of 351573661 is 166375153.

It is a balanced prime because it is at equal distance from previous prime (351573643) and next prime (351573679).

It can be written as a sum of positive squares in only one way, i.e., 331458436 + 20115225 = 18206^2 + 4485^2 .

It is a cyclic number.

It is not a de Polignac number, because 351573661 - 2⁷ = 351573533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 351573661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351573361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175786830 + 175786831.

It is an arithmetic number, because the mean of its divisors is an integer number (175786831).

Almost surely, 2^351573661 is an apocalyptic number.

It is an amenable number.

351573661 is a deficient number, since it is larger than the sum of its proper divisors (1).

351573661 is an equidigital number, since it uses as much as digits as its factorization.

351573661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 37.

The square root of 351573661 is about 18750.2976243045. The cubic root of 351573661 is about 705.7844903128.

The spelling of 351573661 in words is "three hundred fifty-one million, five hundred seventy-three thousand, six hundred sixty-one".