51311293 has 8 divisors (see below), whose sum is σ = 57782016. Its totient is φ = 45141600.

The previous prime is 51311291. The next prime is 51311303. The reversal of 51311293 is 39211315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51311293 - 2¹ = 51311291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51311291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74896 + ... + 75577.

It is an arithmetic number, because the mean of its divisors is an integer number (7222752).

Almost surely, 2^51311293 is an apocalyptic number.

It is an amenable number.

51311293 is a deficient number, since it is larger than the sum of its proper divisors (6470723).

51311293 is a wasteful number, since it uses less digits than its factorization.

51311293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150515.

The product of its digits is 810, while the sum is 25.

The square root of 51311293 is about 7163.1901412709. The cubic root of 51311293 is about 371.5959621603.

The spelling of 51311293 in words is "fifty-one million, three hundred eleven thousand, two hundred ninety-three".