51429895 has 12 divisors (see below), whose sum is σ = 67396104. Its totient is φ = 37364880.

The previous prime is 51429877. The next prime is 51429901. The reversal of 51429895 is 59892415.

It is not a de Polignac number, because 51429895 - 2⁷ = 51429767 is a prime.

It is a super-2 number, since 2×51429895² = 5290068199422050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 52702 + ... + 53668.

It is an arithmetic number, because the mean of its divisors is an integer number (5616342).

Almost surely, 2^51429895 is an apocalyptic number.

51429895 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51429895 is a deficient number, since it is larger than the sum of its proper divisors (15966209).

51429895 is an frugal number, since it uses more digits than its factorization.

51429895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950 (or 983 counting only the distinct ones).

The product of its digits is 129600, while the sum is 43.

The square root of 51429895 is about 7171.4639370215. The cubic root of 51429895 is about 371.8820467558.

The spelling of 51429895 in words is "fifty-one million, four hundred twenty-nine thousand, eight hundred ninety-five".