51439190 has 16 divisors (see below), whose sum is σ = 101008080. Its totient is φ = 18705120.

The previous prime is 51439189. The next prime is 51439217. The reversal of 51439190 is 9193415.

It is a super-2 number, since 2×51439190² = 5291980535712200, which contains 22 as substring.

It is a Curzon number.

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, 233705 + ... + 233924.

It is an arithmetic number, because the mean of its divisors is an integer number (6313005).

Almost surely, 2^51439190 is an apocalyptic number.

51439190 is a deficient number, since it is larger than the sum of its proper divisors (49568890).

51439190 is a wasteful number, since it uses less digits than its factorization.

51439190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467647.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 51439190 is about 7172.1119623163. Note that the first 3 decimals coincide. The cubic root of 51439190 is about 371.9044490013.

The spelling of 51439190 in words is "fifty-one million, four hundred thirty-nine thousand, one hundred ninety".