51402 has 16 divisors (see below), whose sum is σ = 110880. Its totient is φ = 15792.

The previous prime is 51383. The next prime is 51407. The reversal of 51402 is 20415.

It is a plaindrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 51402.

It is not an unprimeable number, because it can be changed into a prime (51407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252 + ... + 407.

It is an arithmetic number, because the mean of its divisors is an integer number (6930).

2⁵¹⁴⁰² is an apocalyptic number.

51402 is an abundant number, since it is smaller than the sum of its proper divisors (59478).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55440).

51402 is a wasteful number, since it uses less digits than its factorization.

51402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 51402 is about 226.7200917431. The cubic root of 51402 is about 37.1814799708.

Adding to 51402 its reverse (20415), we get a palindrome (71817).

It can be divided in two parts, 51 and 402, that multiplied together give a palindrome (20502).

The spelling of 51402 in words is "fifty-one thousand, four hundred two".