51097398 has 64 divisors (see below), whose sum is σ = 119314944. Its totient is φ = 14432000.

The previous prime is 51097381. The next prime is 51097471. The reversal of 51097398 is 89379015.

It is a happy number.

It is a super-2 number, since 2×51097398² = 5221888164740808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61828 + ... + 62648.

It is an arithmetic number, because the mean of its divisors is an integer number (1864296).

Almost surely, 2^51097398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51097398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59657472).

51097398 is an abundant number, since it is smaller than the sum of its proper divisors (68217546).

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

51097398 is a wasteful number, since it uses less digits than its factorization.

51097398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 51097398 is about 7148.2443998509. The cubic root of 51097398 is about 371.0789010800.

The spelling of 51097398 in words is "fifty-one million, ninety-seven thousand, three hundred ninety-eight".