351211502161 has 9 divisors (see below), whose sum is σ = 380314288731. Its totient is φ = 324188121192.

The previous prime is 351211502069. The next prime is 351211502189. The reversal of 351211502161 is 161205112153.

The square root of 351211502161 is 592631.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 51954364225 + 299257137936 = 227935^2 + 547044^2 .

It is a de Polignac number, because none of the positive numbers 2^k-351211502161 is a prime.

It is a super-2 number, since 2×351211502161² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (351211502561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7681410 + ... + 7726996.

Almost surely, 2^351211502161 is an apocalyptic number.

351211502161 is the 592631-st square number.

351211502161 is the 296316-th centered octagonal number.

It is an amenable number.

351211502161 is a deficient number, since it is larger than the sum of its proper divisors (29102786570).

351211502161 is an frugal number, since it uses more digits than its factorization.

351211502161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91200 (or 45600 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 351211502161 in words is "three hundred fifty-one billion, two hundred eleven million, five hundred two thousand, one hundred sixty-one".