31123000229 has 16 divisors (see below), whose sum is σ = 33244992000. Its totient is φ = 29065643376.

The previous prime is 31123000211. The next prime is 31123000243. The reversal of 31123000229 is 92200032113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31123000229 is a prime.

It is a super-2 number, since 2×31123000229² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123000729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3257942 + ... + 3267480.

It is an arithmetic number, because the mean of its divisors is an integer number (2077812000).

Almost surely, 2^31123000229 is an apocalyptic number.

It is an amenable number.

31123000229 is a deficient number, since it is larger than the sum of its proper divisors (2121991771).

31123000229 is a wasteful number, since it uses less digits than its factorization.

31123000229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12904.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 31123000229 in words is "thirty-one billion, one hundred twenty-three million, two hundred twenty-nine", and thus it is an aban number.