1972215152161 has 8 divisors (see below), whose sum is σ = 1973544547424. Its totient is φ = 1970886107520.

The previous prime is 1972215152071. The next prime is 1972215152191. The reversal of 1972215152161 is 1612515122791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1972215152161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972215152191) 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, 11694706 + ... + 11862148.

It is an arithmetic number, because the mean of its divisors is an integer number (246693068428).

Almost surely, 2^{1972215152161} is an apocalyptic number.

It is an amenable number.

1972215152161 is a deficient number, since it is larger than the sum of its proper divisors (1329395263).

1972215152161 is a wasteful number, since it uses less digits than its factorization.

1972215152161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175311.

The product of its digits is 75600, while the sum is 43.

The spelling of 1972215152161 in words is "one trillion, nine hundred seventy-two billion, two hundred fifteen million, one hundred fifty-two thousand, one hundred sixty-one".