51242001163430 has 64 divisors (see below), whose sum is σ = 114997845726720. Its totient is φ = 15971142643200.

The previous prime is 51242001163391. The next prime is 51242001163433. The reversal of 51242001163430 is 3436110024215.

It is a super-2 number, since 2×51242001163430² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51242001163433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31562750 + ... + 33146510.

It is an arithmetic number, because the mean of its divisors is an integer number (1796841339480).

Almost surely, 2^{51242001163430} is an apocalyptic number.

51242001163430 is an abundant number, since it is smaller than the sum of its proper divisors (63755844563290).

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

51242001163430 is a wasteful number, since it uses less digits than its factorization.

51242001163430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625805.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 51242001163430 its reverse (3436110024215), we get a palindrome (54678111187645).

The spelling of 51242001163430 in words is "fifty-one trillion, two hundred forty-two billion, one million, one hundred sixty-three thousand, four hundred thirty".