51354242 has 4 divisors (see below), whose sum is σ = 77031366. Its totient is φ = 25677120.

The previous prime is 51354217. The next prime is 51354257. The reversal of 51354242 is 24245315.

It is a happy number.

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., 50395801 + 958441 = 7099^2 + 979^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12838559 + ... + 12838562.

Almost surely, 2^51354242 is an apocalyptic number.

51354242 is a deficient number, since it is larger than the sum of its proper divisors (25677124).

51354242 is a wasteful number, since it uses less digits than its factorization.

51354242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25677123.

The product of its digits is 4800, while the sum is 26.

The square root of 51354242 is about 7166.1874103319. The cubic root of 51354242 is about 371.6996120147.

Adding to 51354242 its reverse (24245315), we get a palindrome (75599557).

The spelling of 51354242 in words is "fifty-one million, three hundred fifty-four thousand, two hundred forty-two".