51131240162 has 8 divisors (see below), whose sum is σ = 76701914796. Its totient is φ = 25563935232.

The previous prime is 51131240143. The next prime is 51131240183. The reversal of 51131240162 is 26104213115.

It can be written as a sum of positive squares in 2 ways, for example, as 44011424521 + 7119815641 = 209789^2 + 84379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51131240162² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 804143 + ... + 865394.

Almost surely, 2^51131240162 is an apocalyptic number.

51131240162 is a deficient number, since it is larger than the sum of its proper divisors (25570674634).

51131240162 is a wasteful number, since it uses less digits than its factorization.

51131240162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684852.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 51131240162 its reverse (26104213115), we get a palindrome (77235453277).

The spelling of 51131240162 in words is "fifty-one billion, one hundred thirty-one million, two hundred forty thousand, one hundred sixty-two".