51243084 has 48 divisors (see below), whose sum is σ = 133240800. Its totient is φ = 17031168.

The previous prime is 51243079. The next prime is 51243131. The reversal of 51243084 is 48034215.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 66252 + ... + 67020.

It is an arithmetic number, because the mean of its divisors is an integer number (2775850).

Almost surely, 2^51243084 is an apocalyptic number.

51243084 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

51243084 is an abundant number, since it is smaller than the sum of its proper divisors (81997716).

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

51243084 is a wasteful number, since it uses less digits than its factorization.

51243084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399 (or 1391 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 51243084 is about 7158.4274809486. The cubic root of 51243084 is about 371.4312328071.

Adding to 51243084 its reverse (48034215), we get a palindrome (99277299).

The spelling of 51243084 in words is "fifty-one million, two hundred forty-three thousand, eighty-four".