51620601 has 4 divisors (see below), whose sum is σ = 68827472. Its totient is φ = 34413732.

The previous prime is 51620593. The next prime is 51620651. The reversal of 51620601 is 10602615.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51620601 - 2³ = 51620593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51620651) 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, 8603431 + ... + 8603436.

It is an arithmetic number, because the mean of its divisors is an integer number (17206868).

Almost surely, 2^51620601 is an apocalyptic number.

It is an amenable number.

51620601 is a deficient number, since it is larger than the sum of its proper divisors (17206871).

51620601 is a wasteful number, since it uses less digits than its factorization.

51620601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17206870.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 51620601 is about 7184.7478035071. The cubic root of 51620601 is about 372.3411355059.

The spelling of 51620601 in words is "fifty-one million, six hundred twenty thousand, six hundred one".