173218924157 has 2 divisors, whose sum is σ = 173218924158. Its totient is φ = 173218924156.

The previous prime is 173218924127. The next prime is 173218924201. The reversal of 173218924157 is 751429812371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154045260196 + 19173663961 = 392486^2 + 138469^2 .

It is a cyclic number.

It is not a de Polignac number, because 173218924157 - 2¹⁴ = 173218907773 is a prime.

It is a super-2 number, since 2×173218924157² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173218924117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86609462078 + 86609462079.

It is an arithmetic number, because the mean of its divisors is an integer number (86609462079).

Almost surely, 2^173218924157 is an apocalyptic number.

It is an amenable number.

173218924157 is a deficient number, since it is larger than the sum of its proper divisors (1).

173218924157 is an equidigital number, since it uses as much as digits as its factorization.

173218924157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 50.

The spelling of 173218924157 in words is "one hundred seventy-three billion, two hundred eighteen million, nine hundred twenty-four thousand, one hundred fifty-seven".