72070001831 has 2 divisors, whose sum is σ = 72070001832. Its totient is φ = 72070001830.

The previous prime is 72070001821. The next prime is 72070001849. The reversal of 72070001831 is 13810007027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72070001831 - 2⁶ = 72070001767 is a prime.

It is a super-2 number, since 2×72070001831² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72070001794 and 72070001803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72070001821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035000915 + 36035000916.

It is an arithmetic number, because the mean of its divisors is an integer number (36035000916).

Almost surely, 2^72070001831 is an apocalyptic number.

72070001831 is a deficient number, since it is larger than the sum of its proper divisors (1).

72070001831 is an equidigital number, since it uses as much as digits as its factorization.

72070001831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 29.

Adding to 72070001831 its reverse (13810007027), we get a palindrome (85880008858).

The spelling of 72070001831 in words is "seventy-two billion, seventy million, one thousand, eight hundred thirty-one".