51549084 has 18 divisors (see below), whose sum is σ = 130304720. Its totient is φ = 17183016.

The previous prime is 51549079. The next prime is 51549089. The reversal of 51549084 is 48094515.

It is an interprime number because it is at equal distance from previous prime (51549079) and next prime (51549089).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×51549084² = 5314616122478112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1431919 = 51549084 / (5 + 1 + 5 + 4 + 9 + 0 + 8 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51549089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 715924 + ... + 715995.

Almost surely, 2^51549084 is an apocalyptic number.

It is an amenable number.

51549084 is an abundant number, since it is smaller than the sum of its proper divisors (78755636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51549084 is a wasteful number, since it uses less digits than its factorization.

51549084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431929 (or 1431924 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 51549084 is about 7179.7690770665. The cubic root of 51549084 is about 372.1691045247.

The spelling of 51549084 in words is "fifty-one million, five hundred forty-nine thousand, eighty-four".