51415849 has 4 divisors (see below), whose sum is σ = 51915136. Its totient is φ = 50916564.

The previous prime is 51415841. The next prime is 51415873. The reversal of 51415849 is 94851415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51415849 - 2³ = 51415841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51415841) 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, 249489 + ... + 249694.

It is an arithmetic number, because the mean of its divisors is an integer number (12978784).

Almost surely, 2^51415849 is an apocalyptic number.

It is an amenable number.

51415849 is a deficient number, since it is larger than the sum of its proper divisors (499287).

51415849 is a wasteful number, since it uses less digits than its factorization.

51415849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499286.

The product of its digits is 28800, while the sum is 37.

The square root of 51415849 is about 7170.4845721890. The cubic root of 51415849 is about 371.8481888163.

The spelling of 51415849 in words is "fifty-one million, four hundred fifteen thousand, eight hundred forty-nine".