51685350 has 36 divisors (see below), whose sum is σ = 128398404. Its totient is φ = 13759280.

The previous prime is 51685349. The next prime is 51685351. The reversal of 51685350 is 5358615.

It is an interprime number because it is at equal distance from previous prime (51685349) and next prime (51685351).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51685351) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 87757 + ... + 88343.

Almost surely, 2^51685350 is an apocalyptic number.

51685350 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51685350 is an abundant number, since it is smaller than the sum of its proper divisors (76713054).

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

51685350 is an equidigital number, since it uses as much as digits as its factorization.

51685350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 51685350 is about 7189.2523950686. The cubic root of 51685350 is about 372.4967493673.

The spelling of 51685350 in words is "fifty-one million, six hundred eighty-five thousand, three hundred fifty".