5172154381 has 2 divisors, whose sum is σ = 5172154382. Its totient is φ = 5172154380.

The previous prime is 5172154333. The next prime is 5172154397. The reversal of 5172154381 is 1834512715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4087044900 + 1085109481 = 63930^2 + 32941^2 .

It is a cyclic number.

It is not a de Polignac number, because 5172154381 - 2¹⁷ = 5172023309 is a prime.

It is a super-2 number, since 2×5172154381² = 53502361881794986322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5172154381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5172154181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2586077190 + 2586077191.

It is an arithmetic number, because the mean of its divisors is an integer number (2586077191).

Almost surely, 2^5172154381 is an apocalyptic number.

It is an amenable number.

5172154381 is a deficient number, since it is larger than the sum of its proper divisors (1).

5172154381 is an equidigital number, since it uses as much as digits as its factorization.

5172154381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 37.

The square root of 5172154381 is about 71917.6917107328. The cubic root of 5172154381 is about 1729.3802429935.

The spelling of 5172154381 in words is "five billion, one hundred seventy-two million, one hundred fifty-four thousand, three hundred eighty-one".