30312010203173 has 2 divisors, whose sum is σ = 30312010203174. Its totient is φ = 30312010203172.

The previous prime is 30312010203133. The next prime is 30312010203179. The reversal of 30312010203173 is 37130201021303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29286475243204 + 1025534959969 = 5411698^2 + 1012687^2 .

It is a cyclic number.

It is not a de Polignac number, because 30312010203173 - 2¹² = 30312010199077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30312010203179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156005101586 + 15156005101587.

It is an arithmetic number, because the mean of its divisors is an integer number (15156005101587).

Almost surely, 2^{30312010203173} is an apocalyptic number.

It is an amenable number.

30312010203173 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312010203173 is an equidigital number, since it uses as much as digits as its factorization.

30312010203173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

Adding to 30312010203173 its reverse (37130201021303), we get a palindrome (67442211224476).

The spelling of 30312010203173 in words is "thirty trillion, three hundred twelve billion, ten million, two hundred three thousand, one hundred seventy-three".