72030631 has 2 divisors, whose sum is σ = 72030632. Its totient is φ = 72030630.

The previous prime is 72030619. The next prime is 72030643. The reversal of 72030631 is 13603027.

It is a balanced prime because it is at equal distance from previous prime (72030619) and next prime (72030643).

It is a cyclic number.

It is not a de Polignac number, because 72030631 - 2¹³ = 72022439 is a prime.

It is a super-2 number, since 2×72030631² = 10376823604516322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72030661) 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, 36015315 + 36015316.

It is an arithmetic number, because the mean of its divisors is an integer number (36015316).

Almost surely, 2^72030631 is an apocalyptic number.

72030631 is a deficient number, since it is larger than the sum of its proper divisors (1).

72030631 is an equidigital number, since it uses as much as digits as its factorization.

72030631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 72030631 is about 8487.0861312938. The cubic root of 72030631 is about 416.0757516606.

Adding to 72030631 its reverse (13603027), we get a palindrome (85633658).

The spelling of 72030631 in words is "seventy-two million, thirty thousand, six hundred thirty-one".