51503023442 has 12 divisors (see below), whose sum is σ = 83654319690. Its totient is φ = 23770626048.

The previous prime is 51503023393. The next prime is 51503023463. The reversal of 51503023442 is 24432030515.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 23103696001 + 28399327441 = 151999^2 + 168521^2 .

It is a super-2 number, since 2×51503023442² (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 5 ways as a sum of consecutive naturals, for example, 76187567 + ... + 76188242.

Almost surely, 2^51503023442 is an apocalyptic number.

51503023442 is a deficient number, since it is larger than the sum of its proper divisors (32151296248).

51503023442 is a wasteful number, since it uses less digits than its factorization.

51503023442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152375837 (or 152375824 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 51503023442 its reverse (24432030515), we get a palindrome (75935053957).

The spelling of 51503023442 in words is "fifty-one billion, five hundred three million, twenty-three thousand, four hundred forty-two".