31123553051 has 2 divisors, whose sum is σ = 31123553052. Its totient is φ = 31123553050.

The previous prime is 31123553047. The next prime is 31123553059. The reversal of 31123553051 is 15035532113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31123553051 - 2² = 31123553047 is a prime.

It is a super-2 number, since 2×31123553051² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31123553059) 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, 15561776525 + 15561776526.

It is an arithmetic number, because the mean of its divisors is an integer number (15561776526).

Almost surely, 2^31123553051 is an apocalyptic number.

31123553051 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123553051 is an equidigital number, since it uses as much as digits as its factorization.

31123553051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750, while the sum is 29.

The spelling of 31123553051 in words is "thirty-one billion, one hundred twenty-three million, five hundred fifty-three thousand, fifty-one".