7381720051 has 2 divisors, whose sum is σ = 7381720052. Its totient is φ = 7381720050.

The previous prime is 7381720043. The next prime is 7381720063. The reversal of 7381720051 is 1500271837.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7381720051 - 2³ = 7381720043 is a prime.

It is a super-2 number, since 2×7381720051² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7381719989 and 7381720016.

It is not a weakly prime, because it can be changed into another prime (7381720351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3690860025 + 3690860026.

It is an arithmetic number, because the mean of its divisors is an integer number (3690860026).

Almost surely, 2^7381720051 is an apocalyptic number.

7381720051 is a deficient number, since it is larger than the sum of its proper divisors (1).

7381720051 is an equidigital number, since it uses as much as digits as its factorization.

7381720051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 7381720051 is about 85916.9369274766. The cubic root of 7381720051 is about 1947.0892405361.

Adding to 7381720051 its reverse (1500271837), we get a palindrome (8881991888).

The spelling of 7381720051 in words is "seven billion, three hundred eighty-one million, seven hundred twenty thousand, fifty-one".