2172047725031 has 2 divisors, whose sum is σ = 2172047725032. Its totient is φ = 2172047725030.

The previous prime is 2172047724949. The next prime is 2172047725117. The reversal of 2172047725031 is 1305277402712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2172047725031 - 2¹⁸ = 2172047462887 is a prime.

It is a super-2 number, since 2×2172047725031² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2172047725031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172047725831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086023862515 + 1086023862516.

It is an arithmetic number, because the mean of its divisors is an integer number (1086023862516).

Almost surely, 2^{2172047725031} is an apocalyptic number.

2172047725031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172047725031 is an equidigital number, since it uses as much as digits as its factorization.

2172047725031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 164640, while the sum is 41.

The spelling of 2172047725031 in words is "two trillion, one hundred seventy-two billion, forty-seven million, seven hundred twenty-five thousand, thirty-one".