51403206 has 32 divisors (see below), whose sum is σ = 113591808. Its totient is φ = 15424640.

The previous prime is 51403181. The next prime is 51403207. The reversal of 51403206 is 60230415.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51403207) 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 15 ways as a sum of consecutive naturals, for example, 8610 + ... + 13301.

It is an arithmetic number, because the mean of its divisors is an integer number (3549744).

Almost surely, 2^51403206 is an apocalyptic number.

51403206 is an abundant number, since it is smaller than the sum of its proper divisors (62188602).

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

51403206 is a wasteful number, since it uses less digits than its factorization.

51403206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21956.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51403206 is about 7169.6029178749. The cubic root of 51403206 is about 371.8177075403.

The spelling of 51403206 in words is "fifty-one million, four hundred three thousand, two hundred six".