51023134421 has 16 divisors (see below), whose sum is σ = 59897817984. Its totient is φ = 42545248704.

The previous prime is 51023134367. The next prime is 51023134469. The reversal of 51023134421 is 12443132015.

It is a happy number.

It is not a de Polignac number, because 51023134421 - 2³⁴ = 33843265237 is a prime.

It is a super-2 number, since 2×51023134421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023134621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2175071 + ... + 2198403.

It is an arithmetic number, because the mean of its divisors is an integer number (3743613624).

Almost surely, 2^51023134421 is an apocalyptic number.

It is an amenable number.

51023134421 is a deficient number, since it is larger than the sum of its proper divisors (8874683563).

51023134421 is a wasteful number, since it uses less digits than its factorization.

51023134421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31820.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 51023134421 its reverse (12443132015), we get a palindrome (63466266436).

The spelling of 51023134421 in words is "fifty-one billion, twenty-three million, one hundred thirty-four thousand, four hundred twenty-one".