51238415 has 4 divisors (see below), whose sum is σ = 61486104. Its totient is φ = 40990728.

The previous prime is 51238409. The next prime is 51238417. The reversal of 51238415 is 51483215.

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

It is a cyclic number.

It is not a de Polignac number, because 51238415 - 2⁴ = 51238399 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 (51238417) 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, 5123837 + ... + 5123846.

It is an arithmetic number, because the mean of its divisors is an integer number (15371526).

Almost surely, 2^51238415 is an apocalyptic number.

51238415 is a deficient number, since it is larger than the sum of its proper divisors (10247689).

51238415 is a wasteful number, since it uses less digits than its factorization.

51238415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10247688.

The product of its digits is 4800, while the sum is 29.

The square root of 51238415 is about 7158.1013544096. The cubic root of 51238415 is about 371.4199515117.

The spelling of 51238415 in words is "fifty-one million, two hundred thirty-eight thousand, four hundred fifteen".