51353242 has 4 divisors (see below), whose sum is σ = 77029866. Its totient is φ = 25676620.

The previous prime is 51353191. The next prime is 51353249. The reversal of 51353242 is 24235315.

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., 45684081 + 5669161 = 6759^2 + 2381^2 .

It is not an unprimeable number, because it can be changed into a prime (51353249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12838309 + ... + 12838312.

Almost surely, 2^51353242 is an apocalyptic number.

51353242 is a deficient number, since it is larger than the sum of its proper divisors (25676624).

51353242 is a wasteful number, since it uses less digits than its factorization.

51353242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25676623.

The product of its digits is 3600, while the sum is 25.

The square root of 51353242 is about 7166.1176378845. The cubic root of 51353242 is about 371.6971993479.

Adding to 51353242 its reverse (24235315), we get a palindrome (75588557).

The spelling of 51353242 in words is "fifty-one million, three hundred fifty-three thousand, two hundred forty-two".