51383403 has 20 divisors (see below), whose sum is σ = 80098128. Its totient is φ = 32765040.

The previous prime is 51383383. The next prime is 51383419. The reversal of 51383403 is 30438315.

It is a happy number.

It is not a de Polignac number, because 51383403 - 2⁸ = 51383147 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (51383483) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11928 + ... + 15653.

Almost surely, 2^51383403 is an apocalyptic number.

51383403 is a deficient number, since it is larger than the sum of its proper divisors (28714725).

51383403 is a wasteful number, since it uses less digits than its factorization.

51383403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27616 (or 27607 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 51383403 is about 7168.2217460120. The cubic root of 51383403 is about 371.7699540221.

The spelling of 51383403 in words is "fifty-one million, three hundred eighty-three thousand, four hundred three".