51630398 has 16 divisors (see below), whose sum is σ = 80117856. Its totient is φ = 24936960.

The previous prime is 51630367. The next prime is 51630443. The reversal of 51630398 is 89303615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5390 + ... + 11502.

It is an arithmetic number, because the mean of its divisors is an integer number (5007366).

Almost surely, 2^51630398 is an apocalyptic number.

51630398 is a deficient number, since it is larger than the sum of its proper divisors (28487458).

51630398 is a wasteful number, since it uses less digits than its factorization.

51630398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6259.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 51630398 is about 7185.4295626636. The cubic root of 51630398 is about 372.3646893797.

The spelling of 51630398 in words is "fifty-one million, six hundred thirty thousand, three hundred ninety-eight".