51245021342 has 16 divisors (see below), whose sum is σ = 77471154432. Its totient is φ = 25421840280.

The previous prime is 51245021299. The next prime is 51245021351. The reversal of 51245021342 is 24312054215.

It is a congruent number.

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, 57467 + ... + 325257.

It is an arithmetic number, because the mean of its divisors is an integer number (4841947152).

Almost surely, 2^51245021342 is an apocalyptic number.

51245021342 is a deficient number, since it is larger than the sum of its proper divisors (26226133090).

51245021342 is a wasteful number, since it uses less digits than its factorization.

51245021342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268543.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 51245021342 its reverse (24312054215), we get a palindrome (75557075557).

The spelling of 51245021342 in words is "fifty-one billion, two hundred forty-five million, twenty-one thousand, three hundred forty-two".