51922291 has 4 divisors (see below), whose sum is σ = 51940000. Its totient is φ = 51904584.

The previous prime is 51922289. The next prime is 51922309. The reversal of 51922291 is 19222915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19222915 = 5 ⋅3844583.

It is a cyclic number.

It is not a de Polignac number, because 51922291 - 2¹ = 51922289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51922261) 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, 3291 + ... + 10708.

It is an arithmetic number, because the mean of its divisors is an integer number (12985000).

Almost surely, 2^51922291 is an apocalyptic number.

51922291 is a deficient number, since it is larger than the sum of its proper divisors (17709).

51922291 is a wasteful number, since it uses less digits than its factorization.

51922291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17708.

The product of its digits is 3240, while the sum is 31.

The square root of 51922291 is about 7205.7123867110. The cubic root of 51922291 is about 373.0650936860.

The spelling of 51922291 in words is "fifty-one million, nine hundred twenty-two thousand, two hundred ninety-one".