31203154223 has 2 divisors, whose sum is σ = 31203154224. Its totient is φ = 31203154222.

The previous prime is 31203154219. The next prime is 31203154231. The reversal of 31203154223 is 32245130213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31203154223 - 2² = 31203154219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31203154192 and 31203154201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31203154823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15601577111 + 15601577112.

It is an arithmetic number, because the mean of its divisors is an integer number (15601577112).

Almost surely, 2^31203154223 is an apocalyptic number.

31203154223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31203154223 is an equidigital number, since it uses as much as digits as its factorization.

31203154223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 31203154223 its reverse (32245130213), we get a palindrome (63448284436).

The spelling of 31203154223 in words is "thirty-one billion, two hundred three million, one hundred fifty-four thousand, two hundred twenty-three".