51422739 has 16 divisors (see below), whose sum is σ = 72990720. Its totient is φ = 32090240.

The previous prime is 51422737. The next prime is 51422741. The reversal of 51422739 is 93722415.

It is an interprime number because it is at equal distance from previous prime (51422737) and next prime (51422741).

It is a cyclic number.

It is not a de Polignac number, because 51422739 - 2¹ = 51422737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51422737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7102 + ... + 12380.

It is an arithmetic number, because the mean of its divisors is an integer number (4561920).

Almost surely, 2^51422739 is an apocalyptic number.

51422739 is a deficient number, since it is larger than the sum of its proper divisors (21567981).

51422739 is a wasteful number, since it uses less digits than its factorization.

51422739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5490.

The product of its digits is 15120, while the sum is 33.

The square root of 51422739 is about 7170.9649978228. The cubic root of 51422739 is about 371.8647979594.

The spelling of 51422739 in words is "fifty-one million, four hundred twenty-two thousand, seven hundred thirty-nine".