72255031 has 2 divisors, whose sum is σ = 72255032. Its totient is φ = 72255030.

The previous prime is 72255013. The next prime is 72255041. The reversal of 72255031 is 13055227.

Together with previous prime (72255013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (13055227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72255031 - 2⁹ = 72254519 is a prime.

It is a super-2 number, since 2×72255031² = 10441579009621922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72254987 and 72255005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72255041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36127515 + 36127516.

It is an arithmetic number, because the mean of its divisors is an integer number (36127516).

Almost surely, 2^72255031 is an apocalyptic number.

72255031 is a deficient number, since it is larger than the sum of its proper divisors (1).

72255031 is an equidigital number, since it uses as much as digits as its factorization.

72255031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 72255031 is about 8500.2959360248. The cubic root of 72255031 is about 416.5073764094.

The spelling of 72255031 in words is "seventy-two million, two hundred fifty-five thousand, thirty-one".