31243223087 has 2 divisors, whose sum is σ = 31243223088. Its totient is φ = 31243223086.

The previous prime is 31243223083. The next prime is 31243223131. The reversal of 31243223087 is 78032234213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31243223087 - 2² = 31243223083 is a prime.

It is a super-2 number, since 2×31243223087² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31243223083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15621611543 + 15621611544.

It is an arithmetic number, because the mean of its divisors is an integer number (15621611544).

Almost surely, 2^31243223087 is an apocalyptic number.

31243223087 is a deficient number, since it is larger than the sum of its proper divisors (1).

31243223087 is an equidigital number, since it uses as much as digits as its factorization.

31243223087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 31243223087 in words is "thirty-one billion, two hundred forty-three million, two hundred twenty-three thousand, eighty-seven".