154211360231917 has 2 divisors, whose sum is σ = 154211360231918. Its totient is φ = 154211360231916.

The previous prime is 154211360231767. The next prime is 154211360232043. The reversal of 154211360231917 is 719132063112451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141405061000996 + 12806299230921 = 11891386^2 + 3578589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154211360231917 is a prime.

It is a super-2 number, since 2×154211360231917² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154211360234917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77105680115958 + 77105680115959.

It is an arithmetic number, because the mean of its divisors is an integer number (77105680115959).

Almost surely, 2^{154211360231917} is an apocalyptic number.

It is an amenable number.

154211360231917 is a deficient number, since it is larger than the sum of its proper divisors (1).

154211360231917 is an equidigital number, since it uses as much as digits as its factorization.

154211360231917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 154211360231917 in words is "one hundred fifty-four trillion, two hundred eleven billion, three hundred sixty million, two hundred thirty-one thousand, nine hundred seventeen".