51135403 has 8 divisors (see below), whose sum is σ = 58720320. Its totient is φ = 44039880.

The previous prime is 51135397. The next prime is 51135419. The reversal of 51135403 is 30453115.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51135403 - 2⁹ = 51134891 is a prime.

It is a super-2 number, since 2×51135403² = 5229658879944818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51135433) 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, 122125 + ... + 122542.

It is an arithmetic number, because the mean of its divisors is an integer number (7340040).

Almost surely, 2^51135403 is an apocalyptic number.

51135403 is a deficient number, since it is larger than the sum of its proper divisors (7584917).

51135403 is a wasteful number, since it uses less digits than its factorization.

51135403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244697.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 51135403 is about 7150.9022507653. The cubic root of 51135403 is about 371.1708780963.

Adding to 51135403 its reverse (30453115), we get a palindrome (81588518).

The spelling of 51135403 in words is "fifty-one million, one hundred thirty-five thousand, four hundred three".