51042967 has 4 divisors (see below), whose sum is σ = 51084216. Its totient is φ = 51001720.

The previous prime is 51042947. The next prime is 51042973. The reversal of 51042967 is 76924015.

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-51042967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51042947) 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, 18709 + ... + 21262.

It is an arithmetic number, because the mean of its divisors is an integer number (12771054).

Almost surely, 2^51042967 is an apocalyptic number.

51042967 is a deficient number, since it is larger than the sum of its proper divisors (41249).

51042967 is a wasteful number, since it uses less digits than its factorization.

51042967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41248.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 51042967 is about 7144.4360869141. The cubic root of 51042967 is about 370.9470915510.

It can be divided in two parts, 5 and 1042967, that multiplied together give a triangular number (5214835 = T₃₂₂₉).

The spelling of 51042967 in words is "fifty-one million, forty-two thousand, nine hundred sixty-seven".