51403091 has 8 divisors (see below), whose sum is σ = 53728800. Its totient is φ = 49084992.

The previous prime is 51403073. The next prime is 51403097. The reversal of 51403091 is 19030415.

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 51403091 - 2¹⁴ = 51386707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51403097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15335 + ... + 18383.

It is an arithmetic number, because the mean of its divisors is an integer number (6716100).

Almost surely, 2^51403091 is an apocalyptic number.

51403091 is a deficient number, since it is larger than the sum of its proper divisors (2325709).

51403091 is a wasteful number, since it uses less digits than its factorization.

51403091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 51403091 is about 7169.5948979004. The cubic root of 51403091 is about 371.8174302614.

The spelling of 51403091 in words is "fifty-one million, four hundred three thousand, ninety-one".