2172070651 has 2 divisors, whose sum is σ = 2172070652. Its totient is φ = 2172070650.

The previous prime is 2172070627. The next prime is 2172070661. The reversal of 2172070651 is 1560702712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2172070651 - 2²¹ = 2169973499 is a prime.

It is not a weakly prime, because it can be changed into another prime (2172070661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086035325 + 1086035326.

It is an arithmetic number, because the mean of its divisors is an integer number (1086035326).

Almost surely, 2^2172070651 is an apocalyptic number.

2172070651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172070651 is an equidigital number, since it uses as much as digits as its factorization.

2172070651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 2172070651 is about 46605.4787659133. The cubic root of 2172070651 is about 1295.0642526619.

The spelling of 2172070651 in words is "two billion, one hundred seventy-two million, seventy thousand, six hundred fifty-one".