51240052 has 6 divisors (see below), whose sum is σ = 89670098. Its totient is φ = 25620024.

The previous prime is 51240019. The next prime is 51240073. The reversal of 51240052 is 25004215.

It can be written as a sum of positive squares in only one way, i.e., 38019556 + 13220496 = 6166^2 + 3636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405003 + ... + 6405010.

Almost surely, 2^51240052 is an apocalyptic number.

It is an amenable number.

51240052 is a deficient number, since it is larger than the sum of its proper divisors (38430046).

51240052 is a wasteful number, since it uses less digits than its factorization.

51240052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12810017 (or 12810015 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 51240052 is about 7158.2156994603. The cubic root of 51240052 is about 371.4239069293.

Adding to 51240052 its reverse (25004215), we get a palindrome (76244267).

The spelling of 51240052 in words is "fifty-one million, two hundred forty thousand, fifty-two".