2172151537 has 2 divisors, whose sum is σ = 2172151538. Its totient is φ = 2172151536.

The previous prime is 2172151481. The next prime is 2172151549. The reversal of 2172151537 is 7351512712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2114528256 + 57623281 = 45984^2 + 7591^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172151537 - 2⁷ = 2172151409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2172151567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086075768 + 1086075769.

It is an arithmetic number, because the mean of its divisors is an integer number (1086075769).

Almost surely, 2^2172151537 is an apocalyptic number.

It is an amenable number.

2172151537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172151537 is an equidigital number, since it uses as much as digits as its factorization.

2172151537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 34.

The square root of 2172151537 is about 46606.3465313470. The cubic root of 2172151537 is about 1295.0803281468.

The spelling of 2172151537 in words is "two billion, one hundred seventy-two million, one hundred fifty-one thousand, five hundred thirty-seven".