31100421437 has 2 divisors, whose sum is σ = 31100421438. Its totient is φ = 31100421436.

The previous prime is 31100421361. The next prime is 31100421463. The reversal of 31100421437 is 73412400113.

It is an a-pointer prime, because the next prime (31100421463) can be obtained adding 31100421437 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30279828121 + 820593316 = 174011^2 + 28646^2 .

It is a cyclic number.

It is not a de Polignac number, because 31100421437 - 2⁸ = 31100421181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31100423437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15550210718 + 15550210719.

It is an arithmetic number, because the mean of its divisors is an integer number (15550210719).

Almost surely, 2^31100421437 is an apocalyptic number.

It is an amenable number.

31100421437 is a deficient number, since it is larger than the sum of its proper divisors (1).

31100421437 is an equidigital number, since it uses as much as digits as its factorization.

31100421437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The spelling of 31100421437 in words is "thirty-one billion, one hundred million, four hundred twenty-one thousand, four hundred thirty-seven".