51089481 has 8 divisors (see below), whose sum is σ = 75688160. Its totient is φ = 34059636.

The previous prime is 51089477. The next prime is 51089483. The reversal of 51089481 is 18498015.

It is not a de Polignac number, because 51089481 - 2² = 51089477 is a prime.

It is a super-2 number, since 2×51089481² = 5220270137698722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51089483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946075 + ... + 946128.

It is an arithmetic number, because the mean of its divisors is an integer number (9461020).

Almost surely, 2^51089481 is an apocalyptic number.

It is an amenable number.

51089481 is a deficient number, since it is larger than the sum of its proper divisors (24598679).

51089481 is a wasteful number, since it uses less digits than its factorization.

51089481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892212 (or 1892206 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 51089481 is about 7147.6906060629. The cubic root of 51089481 is about 371.0597351765.

The spelling of 51089481 in words is "fifty-one million, eighty-nine thousand, four hundred eighty-one".