51182940 has 24 divisors (see below), whose sum is σ = 143312400. Its totient is φ = 13648768.

The previous prime is 51182939. The next prime is 51182947. The reversal of 51182940 is 4928115.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51182898 and 51182907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51182947) 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, 426465 + ... + 426584.

It is an arithmetic number, because the mean of its divisors is an integer number (5971350).

Almost surely, 2^51182940 is an apocalyptic number.

It is an amenable number.

51182940 is an abundant number, since it is smaller than the sum of its proper divisors (92129460).

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

51182940 is a wasteful number, since it uses less digits than its factorization.

51182940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853061 (or 853059 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 51182940 is about 7154.2253249391. The cubic root of 51182940 is about 371.2858596567.

The spelling of 51182940 in words is "fifty-one million, one hundred eighty-two thousand, nine hundred forty".