51308398 has 16 divisors (see below), whose sum is σ = 81162000. Its totient is φ = 24259392.

The previous prime is 51308393. The next prime is 51308401. The reversal of 51308398 is 89380315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51308393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29908 + ... + 31576.

It is an arithmetic number, because the mean of its divisors is an integer number (5072625).

Almost surely, 2^51308398 is an apocalyptic number.

51308398 is a deficient number, since it is larger than the sum of its proper divisors (29853602).

51308398 is a wasteful number, since it uses less digits than its factorization.

51308398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 51308398 is about 7162.9880636505. The cubic root of 51308398 is about 371.5889735068.

The spelling of 51308398 in words is "fifty-one million, three hundred eight thousand, three hundred ninety-eight".