51402502 has 8 divisors (see below), whose sum is σ = 77231376. Its totient is φ = 25658712.

The previous prime is 51402473. The next prime is 51402503. The reversal of 51402502 is 20520415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51402502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51402503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19738 + ... + 22189.

It is an arithmetic number, because the mean of its divisors is an integer number (9653922).

Almost surely, 2^51402502 is an apocalyptic number.

51402502 is a deficient number, since it is larger than the sum of its proper divisors (25828874).

51402502 is a wasteful number, since it uses less digits than its factorization.

51402502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42542.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 51402502 is about 7169.5538215429. The cubic root of 51402502 is about 371.8160101049.

Adding to 51402502 its reverse (20520415), we get a palindrome (71922917).

The spelling of 51402502 in words is "fifty-one million, four hundred two thousand, five hundred two".