51555892 has 12 divisors (see below), whose sum is σ = 94971520. Its totient is φ = 24421176.

The previous prime is 51555887. The next prime is 51555893. The reversal of 51555892 is 29855515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339108 + ... + 339259.

Almost surely, 2^51555892 is an apocalyptic number.

It is an amenable number.

51555892 is a deficient number, since it is larger than the sum of its proper divisors (43415628).

51555892 is a wasteful number, since it uses less digits than its factorization.

51555892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678390 (or 678388 counting only the distinct ones).

The product of its digits is 90000, while the sum is 40.

The square root of 51555892 is about 7180.2431713696. The cubic root of 51555892 is about 372.1854877174.

The spelling of 51555892 in words is "fifty-one million, five hundred fifty-five thousand, eight hundred ninety-two".