2131554440237 has 2 divisors, whose sum is σ = 2131554440238. Its totient is φ = 2131554440236.

The previous prime is 2131554440233. The next prime is 2131554440263. The reversal of 2131554440237 is 7320444551312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1165695946276 + 965858493961 = 1079674^2 + 982781^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131554440237 - 2² = 2131554440233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131554440194 and 2131554440203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131554440233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065777220118 + 1065777220119.

It is an arithmetic number, because the mean of its divisors is an integer number (1065777220119).

Almost surely, 2^{2131554440237} is an apocalyptic number.

It is an amenable number.

2131554440237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131554440237 is an equidigital number, since it uses as much as digits as its factorization.

2131554440237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 41.

Adding to 2131554440237 its reverse (7320444551312), we get a palindrome (9451998991549).

The spelling of 2131554440237 in words is "two trillion, one hundred thirty-one billion, five hundred fifty-four million, four hundred forty thousand, two hundred thirty-seven".