31437214440421 has 2 divisors, whose sum is σ = 31437214440422. Its totient is φ = 31437214440420.

The previous prime is 31437214440383. The next prime is 31437214440427. The reversal of 31437214440421 is 12404441273413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20195182149025 + 11242032291396 = 4493905^2 + 3352914^2 .

It is a cyclic number.

It is not a de Polignac number, because 31437214440421 - 2⁷ = 31437214440293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31437214440427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15718607220210 + 15718607220211.

It is an arithmetic number, because the mean of its divisors is an integer number (15718607220211).

Almost surely, 2^{31437214440421} is an apocalyptic number.

It is an amenable number.

31437214440421 is a deficient number, since it is larger than the sum of its proper divisors (1).

31437214440421 is an equidigital number, since it uses as much as digits as its factorization.

31437214440421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 40.

The spelling of 31437214440421 in words is "thirty-one trillion, four hundred thirty-seven billion, two hundred fourteen million, four hundred forty thousand, four hundred twenty-one".