51030007 has 4 divisors (see below), whose sum is σ = 58320016. Its totient is φ = 43740000.

The previous prime is 51029987. The next prime is 51030013. The reversal of 51030007 is 70003015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70003015 = 5 ⋅14000603.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51030007 is a prime.

It is a super-2 number, since 2×51030007² = 5208123228840098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51030017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3644994 + ... + 3645007.

It is an arithmetic number, because the mean of its divisors is an integer number (14580004).

Almost surely, 2^51030007 is an apocalyptic number.

51030007 is a deficient number, since it is larger than the sum of its proper divisors (7290009).

51030007 is an equidigital number, since it uses as much as digits as its factorization.

51030007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7290008.

The product of its (nonzero) digits is 105, while the sum is 16.

The square root of 51030007 is about 7143.5290298283. The cubic root of 51030007 is about 370.9156939428.

The spelling of 51030007 in words is "fifty-one million, thirty thousand, seven".