51948391 has 8 divisors (see below), whose sum is σ = 56859264. Its totient is φ = 47068920.

The previous prime is 51948373. The next prime is 51948397. The reversal of 51948391 is 19384915.

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 51948391 - 2⁹ = 51947879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51948397) 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, 4315 + ... + 11068.

It is an arithmetic number, because the mean of its divisors is an integer number (7107408).

Almost surely, 2^51948391 is an apocalyptic number.

51948391 is a deficient number, since it is larger than the sum of its proper divisors (4910873).

51948391 is a wasteful number, since it uses less digits than its factorization.

51948391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15701.

The product of its digits is 38880, while the sum is 40.

The square root of 51948391 is about 7207.5232223004. The cubic root of 51948391 is about 373.1275932900.

The spelling of 51948391 in words is "fifty-one million, nine hundred forty-eight thousand, three hundred ninety-one".