51132420242 has 16 divisors (see below), whose sum is σ = 81215579232. Its totient is φ = 24060755520.

The previous prime is 51132420239. The next prime is 51132420253. The reversal of 51132420242 is 24202423115.

It is a super-2 number, since 2×51132420242² (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 7 ways as a sum of consecutive naturals, for example, 614033 + ... + 692315.

It is an arithmetic number, because the mean of its divisors is an integer number (5075973702).

Almost surely, 2^51132420242 is an apocalyptic number.

51132420242 is a deficient number, since it is larger than the sum of its proper divisors (30083158990).

51132420242 is a wasteful number, since it uses less digits than its factorization.

51132420242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97513.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 51132420242 its reverse (24202423115), we get a palindrome (75334843357).

The spelling of 51132420242 in words is "fifty-one billion, one hundred thirty-two million, four hundred twenty thousand, two hundred forty-two".