51145246 has 4 divisors (see below), whose sum is σ = 76717872. Its totient is φ = 25572622.

The previous prime is 51145229. The next prime is 51145249. The reversal of 51145246 is 64254115.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12786310 + ... + 12786313.

It is an arithmetic number, because the mean of its divisors is an integer number (19179468).

Almost surely, 2^51145246 is an apocalyptic number.

51145246 is a deficient number, since it is larger than the sum of its proper divisors (25572626).

51145246 is a wasteful number, since it uses less digits than its factorization.

51145246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25572625.

The product of its digits is 4800, while the sum is 28.

The square root of 51145246 is about 7151.5904524798. The cubic root of 51145246 is about 371.1946919992.

The spelling of 51145246 in words is "fifty-one million, one hundred forty-five thousand, two hundred forty-six".