51949937 has 4 divisors (see below), whose sum is σ = 55946100. Its totient is φ = 47953776.

The previous prime is 51949901. The next prime is 51949957. The reversal of 51949937 is 73994915.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23902321 + 28047616 = 4889^2 + 5296^2 .

It is not a de Polignac number, because 51949937 - 2¹⁸ = 51687793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51949891 and 51949900.

It is not an unprimeable number, because it can be changed into a prime (51949957) 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, 1998062 + ... + 1998087.

It is an arithmetic number, because the mean of its divisors is an integer number (13986525).

Almost surely, 2^51949937 is an apocalyptic number.

It is an amenable number.

51949937 is a deficient number, since it is larger than the sum of its proper divisors (3996163).

51949937 is a wasteful number, since it uses less digits than its factorization.

51949937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996162.

The product of its digits is 306180, while the sum is 47.

The square root of 51949937 is about 7207.6304705499. The cubic root of 51949937 is about 373.1312947171.

The spelling of 51949937 in words is "fifty-one million, nine hundred forty-nine thousand, nine hundred thirty-seven".