51311953 has 16 divisors (see below), whose sum is σ = 64235520. Its totient is φ = 39819600.

The previous prime is 51311941. The next prime is 51311963. The reversal of 51311953 is 35911315.

It is a cyclic number.

It is not a de Polignac number, because 51311953 - 2⁹ = 51311441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51311903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19638 + ... + 22096.

It is an arithmetic number, because the mean of its divisors is an integer number (4014720).

Almost surely, 2^51311953 is an apocalyptic number.

It is an amenable number.

51311953 is a deficient number, since it is larger than the sum of its proper divisors (12923567).

51311953 is a wasteful number, since it uses less digits than its factorization.

51311953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748.

The product of its digits is 2025, while the sum is 28.

The square root of 51311953 is about 7163.2362099822. The cubic root of 51311953 is about 371.5975553917.

The spelling of 51311953 in words is "fifty-one million, three hundred eleven thousand, nine hundred fifty-three".