51371493 has 8 divisors (see below), whose sum is σ = 68843808. Its totient is φ = 34073424.

The previous prime is 51371471. The next prime is 51371521. The reversal of 51371493 is 39417315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51371493 - 2⁵ = 51371461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51371393) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 42871 + ... + 44052.

It is an arithmetic number, because the mean of its divisors is an integer number (8605476).

Almost surely, 2^51371493 is an apocalyptic number.

It is an amenable number.

51371493 is a deficient number, since it is larger than the sum of its proper divisors (17472315).

51371493 is a wasteful number, since it uses less digits than its factorization.

51371493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87123.

The product of its digits is 11340, while the sum is 33.

The square root of 51371493 is about 7167.3909478973. The cubic root of 51371493 is about 371.7412280001.

The spelling of 51371493 in words is "fifty-one million, three hundred seventy-one thousand, four hundred ninety-three".