51988497 has 24 divisors (see below), whose sum is σ = 76684608. Its totient is φ = 31305120.

The previous prime is 51988493. The next prime is 51988511. The reversal of 51988497 is 79488915.

It is not a de Polignac number, because 51988497 - 2² = 51988493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51988493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71148 + ... + 71874.

It is an arithmetic number, because the mean of its divisors is an integer number (3195192).

Almost surely, 2^51988497 is an apocalyptic number.

It is an amenable number.

51988497 is a deficient number, since it is larger than the sum of its proper divisors (24696111).

51988497 is a wasteful number, since it uses less digits than its factorization.

51988497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949 (or 938 counting only the distinct ones).

The product of its digits is 725760, while the sum is 51.

The square root of 51988497 is about 7210.3049172694. The cubic root of 51988497 is about 373.2235911675.

It can be divided in two parts, 5198 and 8497, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 51988497 in words is "fifty-one million, nine hundred eighty-eight thousand, four hundred ninety-seven".