331797537961 has 8 divisors (see below), whose sum is σ = 357074304264. Its totient is φ = 307160689920.

The previous prime is 331797537949. The next prime is 331797537971. The reversal of 331797537961 is 169735797133.

It can be written as a sum of positive squares in 4 ways, for example, as 7659750400 + 324137787561 = 87520^2 + 569331^2 .

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 331797537961 - 2¹⁹ = 331797013673 is a prime.

It is a super-2 number, since 2×331797537961² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331797537961.

It is not an unprimeable number, because it can be changed into a prime (331797537971) 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, 159978490 + ... + 159980563.

It is an arithmetic number, because the mean of its divisors is an integer number (44634288033).

Almost surely, 2^331797537961 is an apocalyptic number.

It is an amenable number.

331797537961 is a deficient number, since it is larger than the sum of its proper divisors (25276766303).

331797537961 is a wasteful number, since it uses less digits than its factorization.

331797537961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319959131.

The product of its digits is 22504230, while the sum is 61.

The spelling of 331797537961 in words is "three hundred thirty-one billion, seven hundred ninety-seven million, five hundred thirty-seven thousand, nine hundred sixty-one".