51401880 has 192 divisors, whose sum is σ = 182463840. Its totient is φ = 12496896.

The previous prime is 51401873. The next prime is 51401881. The reversal of 51401880 is 8810415.

It is a super-3 number, since 3×51401880³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51401881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 226327 + ... + 226553.

Almost surely, 2^51401880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51401880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91231920).

51401880 is an abundant number, since it is smaller than the sum of its proper divisors (131061960).

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

51401880 is a wasteful number, since it uses less digits than its factorization.

51401880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 51401880 is about 7169.5104435380. The cubic root of 51401880 is about 371.8145103693.

The spelling of 51401880 in words is "fifty-one million, four hundred one thousand, eight hundred eighty".