51393108 has 48 divisors (see below), whose sum is σ = 136745280. Its totient is φ = 14882304.

The previous prime is 51393107. The next prime is 51393113. The reversal of 51393108 is 80139315.

It is a happy number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51393103) 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, 7038 + ... + 12341.

It is an arithmetic number, because the mean of its divisors is an integer number (2848860).

Almost surely, 2^51393108 is an apocalyptic number.

It is an amenable number.

51393108 is an abundant number, since it is smaller than the sum of its proper divisors (85352172).

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

51393108 is a wasteful number, since it uses less digits than its factorization.

51393108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19416 (or 19414 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 51393108 is about 7168.8986601848. The cubic root of 51393108 is about 371.7933584683.

The spelling of 51393108 in words is "fifty-one million, three hundred ninety-three thousand, one hundred eight".