51553406 has 4 divisors (see below), whose sum is σ = 77330112. Its totient is φ = 25776702.

The previous prime is 51553399. The next prime is 51553409. The reversal of 51553406 is 60435515.

51553406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51553409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12888350 + ... + 12888353.

It is an arithmetic number, because the mean of its divisors is an integer number (19332528).

Almost surely, 2^51553406 is an apocalyptic number.

51553406 is a deficient number, since it is larger than the sum of its proper divisors (25776706).

51553406 is a wasteful number, since it uses less digits than its factorization.

51553406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25776705.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 51553406 is about 7180.0700553685. The cubic root of 51553406 is about 372.1795054203.

The spelling of 51553406 in words is "fifty-one million, five hundred fifty-three thousand, four hundred six".