51911963 has 4 divisors (see below), whose sum is σ = 52891488. Its totient is φ = 50932440.

The previous prime is 51911953. The next prime is 51911983. The reversal of 51911963 is 36911915.

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

It is a cyclic number.

It is not a de Polignac number, because 51911963 - 2¹⁴ = 51895579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51911953) 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, 489683 + ... + 489788.

It is an arithmetic number, because the mean of its divisors is an integer number (13222872).

Almost surely, 2^51911963 is an apocalyptic number.

51911963 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

51911963 is a deficient number, since it is larger than the sum of its proper divisors (979525).

51911963 is an equidigital number, since it uses as much as digits as its factorization.

51911963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979524.

The product of its digits is 7290, while the sum is 35.

The square root of 51911963 is about 7204.9956974311. The cubic root of 51911963 is about 373.0403562581.

The spelling of 51911963 in words is "fifty-one million, nine hundred eleven thousand, nine hundred sixty-three".