51452639 has 16 divisors (see below), whose sum is σ = 61467648. Its totient is φ = 42148512.

The previous prime is 51452623. The next prime is 51452647. The reversal of 51452639 is 93625415.

It is not a de Polignac number, because 51452639 - 2⁴ = 51452623 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 51452599 and 51452608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51452339) 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, 12329 + ... + 15965.

It is an arithmetic number, because the mean of its divisors is an integer number (3841728).

Almost surely, 2^51452639 is an apocalyptic number.

51452639 is a deficient number, since it is larger than the sum of its proper divisors (10015009).

51452639 is a wasteful number, since it uses less digits than its factorization.

51452639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734.

The product of its digits is 32400, while the sum is 35.

The square root of 51452639 is about 7173.0494909766. The cubic root of 51452639 is about 371.9368581890.

The spelling of 51452639 in words is "fifty-one million, four hundred fifty-two thousand, six hundred thirty-nine".