51117850 has 24 divisors (see below), whose sum is σ = 108662688. Its totient is φ = 17526000.

The previous prime is 51117821. The next prime is 51117863. The reversal of 51117850 is 5871115.

It is a super-2 number, since 2×51117850² = 5226069177245000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72676 + ... + 73375.

It is an arithmetic number, because the mean of its divisors is an integer number (4527612).

Almost surely, 2^51117850 is an apocalyptic number.

51117850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51117850 is an abundant number, since it is smaller than the sum of its proper divisors (57544838).

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

51117850 is a wasteful number, since it uses less digits than its factorization.

51117850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146070 (or 146065 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 28.

The square root of 51117850 is about 7149.6748177802. The cubic root of 51117850 is about 371.1284032312.

Adding to 51117850 its reverse (5871115), we get a palindrome (56988965).

The spelling of 51117850 in words is "fifty-one million, one hundred seventeen thousand, eight hundred fifty".