51417739 has 4 divisors (see below), whose sum is σ = 51465960. Its totient is φ = 51369520.

The previous prime is 51417727. The next prime is 51417749. The reversal of 51417739 is 93771415.

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-51417739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51417698 and 51417707.

It is not an unprimeable number, because it can be changed into a prime (51417749) 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, 22474 + ... + 24655.

It is an arithmetic number, because the mean of its divisors is an integer number (12866490).

Almost surely, 2^51417739 is an apocalyptic number.

51417739 is a deficient number, since it is larger than the sum of its proper divisors (48221).

51417739 is a wasteful number, since it uses less digits than its factorization.

51417739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48220.

The product of its digits is 26460, while the sum is 37.

The square root of 51417739 is about 7170.6163612342. The cubic root of 51417739 is about 371.8527450279.

It can be divided in two parts, 5141 and 7739, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 51417739 in words is "fifty-one million, four hundred seventeen thousand, seven hundred thirty-nine".