72430051 has 2 divisors, whose sum is σ = 72430052. Its totient is φ = 72430050.

The previous prime is 72430037. The next prime is 72430063. The reversal of 72430051 is 15003427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72430051 - 2⁷ = 72429923 is a prime.

It is a super-2 number, since 2×72430051² = 10492224575725202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72430091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36215025 + 36215026.

It is an arithmetic number, because the mean of its divisors is an integer number (36215026).

Almost surely, 2^72430051 is an apocalyptic number.

72430051 is a deficient number, since it is larger than the sum of its proper divisors (1).

72430051 is an equidigital number, since it uses as much as digits as its factorization.

72430051 is an evil number, because the sum of its binary digits is even.

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

The square root of 72430051 is about 8510.5846450171. The cubic root of 72430051 is about 416.8434007234.

Adding to 72430051 its reverse (15003427), we get a palindrome (87433478).

The spelling of 72430051 in words is "seventy-two million, four hundred thirty thousand, fifty-one".