51229407 has 4 divisors (see below), whose sum is σ = 68305880. Its totient is φ = 34152936.

The previous prime is 51229393. The next prime is 51229417. The reversal of 51229407 is 70492215.

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

It is not a de Polignac number, because 51229407 - 2¹⁸ = 50967263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51229417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8538232 + ... + 8538237.

It is an arithmetic number, because the mean of its divisors is an integer number (17076470).

Almost surely, 2^51229407 is an apocalyptic number.

51229407 is a deficient number, since it is larger than the sum of its proper divisors (17076473).

51229407 is a wasteful number, since it uses less digits than its factorization.

51229407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17076472.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 51229407 is about 7157.4721096208. The cubic root of 51229407 is about 371.3981843343.

The spelling of 51229407 in words is "fifty-one million, two hundred twenty-nine thousand, four hundred seven".