51663498 has 8 divisors (see below), whose sum is σ = 103327008. Its totient is φ = 17221164.

The previous prime is 51663463. The next prime is 51663533. The reversal of 51663498 is 89436615.

It is an interprime number because it is at equal distance from previous prime (51663463) and next prime (51663533).

It is a sphenic number, since it is the product of 3 distinct primes.

51663498 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4305286 + ... + 4305297.

It is an arithmetic number, because the mean of its divisors is an integer number (12915876).

Almost surely, 2^51663498 is an apocalyptic number.

51663498 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51663498 is a wasteful number, since it uses less digits than its factorization.

51663498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610588.

The product of its digits is 155520, while the sum is 42.

The square root of 51663498 is about 7187.7324658059. The cubic root of 51663498 is about 372.4442461185. Note that the first 3 decimals are identical.

The spelling of 51663498 in words is "fifty-one million, six hundred sixty-three thousand, four hundred ninety-eight".