187213455031 has 2 divisors, whose sum is σ = 187213455032. Its totient is φ = 187213455030.

The previous prime is 187213455019. The next prime is 187213455059. The reversal of 187213455031 is 130554312781.

It is a weak prime.

It is an emirp because it is prime and its reverse (130554312781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187213455031 - 2⁵ = 187213454999 is a prime.

It is a super-2 number, since 2×187213455031² (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 (187213455931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93606727515 + 93606727516.

It is an arithmetic number, because the mean of its divisors is an integer number (93606727516).

Almost surely, 2^187213455031 is an apocalyptic number.

187213455031 is a deficient number, since it is larger than the sum of its proper divisors (1).

187213455031 is an equidigital number, since it uses as much as digits as its factorization.

187213455031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 187213455031 in words is "one hundred eighty-seven billion, two hundred thirteen million, four hundred fifty-five thousand, thirty-one".