51654242 has 4 divisors (see below), whose sum is σ = 77481366. Its totient is φ = 25827120.

The previous prime is 51654203. The next prime is 51654271. The reversal of 51654242 is 24245615.

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

It can be written as a sum of positive squares in only one way, i.e., 32478601 + 19175641 = 5699^2 + 4379^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12913559 + ... + 12913562.

Almost surely, 2^51654242 is an apocalyptic number.

51654242 is a deficient number, since it is larger than the sum of its proper divisors (25827124).

51654242 is a wasteful number, since it uses less digits than its factorization.

51654242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25827123.

The product of its digits is 9600, while the sum is 29.

The square root of 51654242 is about 7187.0885621370. The cubic root of 51654242 is about 372.4220024973.

Adding to 51654242 its reverse (24245615), we get a palindrome (75899857).

The spelling of 51654242 in words is "fifty-one million, six hundred fifty-four thousand, two hundred forty-two".