51001007 has 4 divisors (see below), whose sum is σ = 52244976. Its totient is φ = 49757040.

The previous prime is 51001001. The next prime is 51001009. The reversal of 51001007 is 70010015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70010015 = 5 ⋅14002003.

It is a cyclic number.

It is not a de Polignac number, because 51001007 - 2⁸ = 51000751 is a prime.

It is a super-2 number, since 2×51001007² = 5202205430028098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51000982 and 51001000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001001) 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, 621923 + ... + 622004.

It is an arithmetic number, because the mean of its divisors is an integer number (13061244).

Almost surely, 2^51001007 is an apocalyptic number.

51001007 is a deficient number, since it is larger than the sum of its proper divisors (1243969).

51001007 is a wasteful number, since it uses less digits than its factorization.

51001007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243968.

The product of its (nonzero) digits is 35, while the sum is 14.

The square root of 51001007 is about 7141.4989322971. The cubic root of 51001007 is about 370.8454176875.

The spelling of 51001007 in words is "fifty-one million, one thousand, seven".