51371506 has 4 divisors (see below), whose sum is σ = 77057262. Its totient is φ = 25685752.

The previous prime is 51371471. The next prime is 51371521. The reversal of 51371506 is 60517315.

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

It can be written as a sum of positive squares in only one way, i.e., 44823025 + 6548481 = 6695^2 + 2559^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12842875 + ... + 12842878.

Almost surely, 2^51371506 is an apocalyptic number.

51371506 is a deficient number, since it is larger than the sum of its proper divisors (25685756).

51371506 is a wasteful number, since it uses less digits than its factorization.

51371506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25685755.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 51371506 is about 7167.3918547823. The cubic root of 51371506 is about 371.7412593575.

The spelling of 51371506 in words is "fifty-one million, three hundred seventy-one thousand, five hundred six".