720135430031 has 2 divisors, whose sum is σ = 720135430032. Its totient is φ = 720135430030.

The previous prime is 720135429997. The next prime is 720135430039. The reversal of 720135430031 is 130034531027.

It is a strong prime.

It is an emirp because it is prime and its reverse (130034531027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720135430031 - 2⁶ = 720135429967 is a prime.

It is a super-2 number, since 2×720135430031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 720135429976 and 720135430003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720135430039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360067715015 + 360067715016.

It is an arithmetic number, because the mean of its divisors is an integer number (360067715016).

Almost surely, 2^720135430031 is an apocalyptic number.

720135430031 is a deficient number, since it is larger than the sum of its proper divisors (1).

720135430031 is an equidigital number, since it uses as much as digits as its factorization.

720135430031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 29.

Adding to 720135430031 its reverse (130034531027), we get a palindrome (850169961058).

The spelling of 720135430031 in words is "seven hundred twenty billion, one hundred thirty-five million, four hundred thirty thousand, thirty-one".