51397100 has 36 divisors (see below), whose sum is σ = 111883464. Its totient is φ = 20494080.

The previous prime is 51397081. The next prime is 51397117. The reversal of 51397100 is 179315.

It is a self number, because there is not a number n which added to its sum of digits gives 51397100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42707 + ... + 43893.

It is an arithmetic number, because the mean of its divisors is an integer number (3107874).

Almost surely, 2^51397100 is an apocalyptic number.

51397100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51397100 is an abundant number, since it is smaller than the sum of its proper divisors (60486364).

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

51397100 is a wasteful number, since it uses less digits than its factorization.

51397100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 51397100 is about 7169.1770796933. The cubic root of 51397100 is about 371.8029846660.

The spelling of 51397100 in words is "fifty-one million, three hundred ninety-seven thousand, one hundred".