51854013 has 12 divisors (see below), whose sum is σ = 77674688. Its totient is φ = 34569180.

The previous prime is 51853951. The next prime is 51854039. The reversal of 51854013 is 31045815.

It is a de Polignac number, because none of the positive numbers 2^k-51854013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51854083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106453 + ... + 106938.

Almost surely, 2^51854013 is an apocalyptic number.

It is an amenable number.

51854013 is a deficient number, since it is larger than the sum of its proper divisors (25820675).

51854013 is an equidigital number, since it uses as much as digits as its factorization.

51854013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213406 (or 213394 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51854013 is about 7200.9730592469. The cubic root of 51854013 is about 372.9014946392.

Adding to 51854013 its reverse (31045815), we get a palindrome (82899828).

The spelling of 51854013 in words is "fifty-one million, eight hundred fifty-four thousand, thirteen".