72273031 has 2 divisors, whose sum is σ = 72273032. Its totient is φ = 72273030.

The previous prime is 72273023. The next prime is 72273041. The reversal of 72273031 is 13037227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72273031 - 2³ = 72273023 is a prime.

It is a super-2 number, since 2×72273031² = 10446782019853922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72272987 and 72273005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72273041) 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, 36136515 + 36136516.

It is an arithmetic number, because the mean of its divisors is an integer number (36136516).

Almost surely, 2^72273031 is an apocalyptic number.

72273031 is a deficient number, since it is larger than the sum of its proper divisors (1).

72273031 is an equidigital number, since it uses as much as digits as its factorization.

72273031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 72273031 is about 8501.3546567591. The cubic root of 72273031 is about 416.5419599773.

The spelling of 72273031 in words is "seventy-two million, two hundred seventy-three thousand, thirty-one".