51808485 has 16 divisors (see below), whose sum is σ = 83700864. Its totient is φ = 27362112.

The previous prime is 51808457. The next prime is 51808499. The reversal of 51808485 is 58480815.

It is not a de Polignac number, because 51808485 - 2⁷ = 51808357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15222 + ... + 18311.

It is an arithmetic number, because the mean of its divisors is an integer number (5231304).

Almost surely, 2^51808485 is an apocalyptic number.

It is an amenable number.

51808485 is a deficient number, since it is larger than the sum of its proper divisors (31892379).

51808485 is a wasteful number, since it uses less digits than its factorization.

51808485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33644.

The product of its (nonzero) digits is 51200, while the sum is 39.

The square root of 51808485 is about 7197.8111256131. The cubic root of 51808485 is about 372.7923264222.

The spelling of 51808485 in words is "fifty-one million, eight hundred eight thousand, four hundred eighty-five".