72050431 has 2 divisors, whose sum is σ = 72050432. Its totient is φ = 72050430.

The previous prime is 72050423. The next prime is 72050441. The reversal of 72050431 is 13405027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72050431 - 2³ = 72050423 is a prime.

It is a super-2 number, since 2×72050431² = 10382529214571522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72050411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36025215 + 36025216.

It is an arithmetic number, because the mean of its divisors is an integer number (36025216).

Almost surely, 2^72050431 is an apocalyptic number.

72050431 is a deficient number, since it is larger than the sum of its proper divisors (1).

72050431 is an equidigital number, since it uses as much as digits as its factorization.

72050431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 72050431 is about 8488.2525292312. The cubic root of 72050431 is about 416.1138722260.

Adding to 72050431 its reverse (13405027), we get a palindrome (85455458).

The spelling of 72050431 in words is "seventy-two million, fifty thousand, four hundred thirty-one".