51485331 has 4 divisors (see below), whose sum is σ = 68647112. Its totient is φ = 34323552.

The previous prime is 51485303. The next prime is 51485417. The reversal of 51485331 is 13358415.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51485331 - 2⁹ = 51484819 is a prime.

It is a super-2 number, since 2×51485331² = 5301478616359122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51485131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8580886 + ... + 8580891.

It is an arithmetic number, because the mean of its divisors is an integer number (17161778).

Almost surely, 2^51485331 is an apocalyptic number.

51485331 is a deficient number, since it is larger than the sum of its proper divisors (17161781).

51485331 is a wasteful number, since it uses less digits than its factorization.

51485331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17161780.

The product of its digits is 7200, while the sum is 30.

The square root of 51485331 is about 7175.3279367566. The cubic root of 51485331 is about 372.0156153117.

The spelling of 51485331 in words is "fifty-one million, four hundred eighty-five thousand, three hundred thirty-one".