51253887 has 16 divisors (see below), whose sum is σ = 72464000. Its totient is φ = 32133024.

The previous prime is 51253879. The next prime is 51253889. The reversal of 51253887 is 78835215.

It is not a de Polignac number, because 51253887 - 2³ = 51253879 is a prime.

It is a super-3 number, since 3×51253887³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51253889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4689 + ... + 11157.

It is an arithmetic number, because the mean of its divisors is an integer number (4529000).

Almost surely, 2^51253887 is an apocalyptic number.

51253887 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

51253887 is a deficient number, since it is larger than the sum of its proper divisors (21210113).

51253887 is a wasteful number, since it uses less digits than its factorization.

51253887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6630.

The product of its digits is 67200, while the sum is 39.

The square root of 51253887 is about 7159.1820063468. The cubic root of 51253887 is about 371.4573325221.

The spelling of 51253887 in words is "fifty-one million, two hundred fifty-three thousand, eight hundred eighty-seven".