51151002042 has 16 divisors (see below), whose sum is σ = 116916576192. Its totient is φ = 14614572000.

The previous prime is 51151002017. The next prime is 51151002047. The reversal of 51151002042 is 24020015115.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (51151002047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608940459 + ... + 608940542.

It is an arithmetic number, because the mean of its divisors is an integer number (7307286012).

Almost surely, 2^51151002042 is an apocalyptic number.

51151002042 is an abundant number, since it is smaller than the sum of its proper divisors (65765574150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51151002042 is a wasteful number, since it uses less digits than its factorization.

51151002042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217881013.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 51151002042 its reverse (24020015115), we get a palindrome (75171017157).

The spelling of 51151002042 in words is "fifty-one billion, one hundred fifty-one million, two thousand, forty-two".