51622651 has 4 divisors (see below), whose sum is σ = 51648192. Its totient is φ = 51597112.

The previous prime is 51622643. The next prime is 51622663. The reversal of 51622651 is 15622615.

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 51622651 - 2³ = 51622643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51622621) 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, 9451 + ... + 13876.

It is an arithmetic number, because the mean of its divisors is an integer number (12912048).

Almost surely, 2^51622651 is an apocalyptic number.

51622651 is a deficient number, since it is larger than the sum of its proper divisors (25541).

51622651 is a wasteful number, since it uses less digits than its factorization.

51622651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25540.

The product of its digits is 3600, while the sum is 28.

The square root of 51622651 is about 7184.8904654142. The cubic root of 51622651 is about 372.3460643470.

The spelling of 51622651 in words is "fifty-one million, six hundred twenty-two thousand, six hundred fifty-one".