51701039 has 4 divisors (see below), whose sum is σ = 55678056. Its totient is φ = 47724024.

The previous prime is 51701011. The next prime is 51701053. The reversal of 51701039 is 93010715.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51701039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51700999 and 51701017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51701059) 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, 1988489 + ... + 1988514.

It is an arithmetic number, because the mean of its divisors is an integer number (13919514).

Almost surely, 2^51701039 is an apocalyptic number.

51701039 is a deficient number, since it is larger than the sum of its proper divisors (3977017).

51701039 is a wasteful number, since it uses less digits than its factorization.

51701039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977016.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 51701039 is about 7190.3434549401. The cubic root of 51701039 is about 372.5344358057.

The spelling of 51701039 in words is "fifty-one million, seven hundred one thousand, thirty-nine".