51143242 has 16 divisors (see below), whose sum is σ = 83849472. Its totient is φ = 23290560.

The previous prime is 51143233. The next prime is 51143291. The reversal of 51143242 is 24234115.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23208 + ... + 25315.

It is an arithmetic number, because the mean of its divisors is an integer number (5240592).

Almost surely, 2^51143242 is an apocalyptic number.

51143242 is a deficient number, since it is larger than the sum of its proper divisors (32706230).

51143242 is a wasteful number, since it uses less digits than its factorization.

51143242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48573.

The product of its digits is 960, while the sum is 22.

The square root of 51143242 is about 7151.4503424131. The cubic root of 51143242 is about 371.1898438205.

Adding to 51143242 its reverse (24234115), we get a palindrome (75377357).

The spelling of 51143242 in words is "fifty-one million, one hundred forty-three thousand, two hundred forty-two".