51449366 has 4 divisors (see below), whose sum is σ = 77174052. Its totient is φ = 25724682.

The previous prime is 51449341. The next prime is 51449381. The reversal of 51449366 is 66394415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66394415 = 5 ⋅13278883.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12862340 + ... + 12862343.

It is an arithmetic number, because the mean of its divisors is an integer number (19293513).

Almost surely, 2^51449366 is an apocalyptic number.

51449366 is a deficient number, since it is larger than the sum of its proper divisors (25724686).

51449366 is a wasteful number, since it uses less digits than its factorization.

51449366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25724685.

The product of its digits is 77760, while the sum is 38.

The square root of 51449366 is about 7172.8213417037. The cubic root of 51449366 is about 371.9289714853.

It can be divided in two parts, 51449 and 366, that added together give a palindrome (51815).

The spelling of 51449366 in words is "fifty-one million, four hundred forty-nine thousand, three hundred sixty-six".