51438937 has 8 divisors (see below), whose sum is σ = 56558592. Its totient is φ = 46393200.

The previous prime is 51438931. The next prime is 51438941. The reversal of 51438937 is 73983415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51438937 - 2¹⁹ = 50914649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51438937.

It is not an unprimeable number, because it can be changed into a prime (51438931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17014 + ... + 19807.

It is an arithmetic number, because the mean of its divisors is an integer number (7069824).

Almost surely, 2^51438937 is an apocalyptic number.

It is an amenable number.

51438937 is a deficient number, since it is larger than the sum of its proper divisors (5119655).

51438937 is a wasteful number, since it uses less digits than its factorization.

51438937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36959.

The product of its digits is 90720, while the sum is 40.

The square root of 51438937 is about 7172.0943245331. The cubic root of 51438937 is about 371.9038392718.

The spelling of 51438937 in words is "fifty-one million, four hundred thirty-eight thousand, nine hundred thirty-seven".