51813049 has 4 divisors (see below), whose sum is σ = 52030080. Its totient is φ = 51596020.

The previous prime is 51813037. The next prime is 51813067. The reversal of 51813049 is 94031815.

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 51813049 - 2⁷ = 51812921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51813049.

It is not an unprimeable number, because it can be changed into a prime (51813149) 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, 108157 + ... + 108634.

It is an arithmetic number, because the mean of its divisors is an integer number (13007520).

Almost surely, 2^51813049 is an apocalyptic number.

It is an amenable number.

51813049 is a deficient number, since it is larger than the sum of its proper divisors (217031).

51813049 is a wasteful number, since it uses less digits than its factorization.

51813049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217030.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 51813049 is about 7198.1281594592. The cubic root of 51813049 is about 372.8032729831.

The spelling of 51813049 in words is "fifty-one million, eight hundred thirteen thousand, forty-nine".