51609061 has 8 divisors (see below), whose sum is σ = 59053824. Its totient is φ = 44182320.

The previous prime is 51609049. The next prime is 51609091. The reversal of 51609061 is 16090615.

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

It is not a de Polignac number, because 51609061 - 2⁷ = 51608933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51609001) 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, 2331 + ... + 10423.

It is an arithmetic number, because the mean of its divisors is an integer number (7381728).

Almost surely, 2^51609061 is an apocalyptic number.

It is an amenable number.

51609061 is a deficient number, since it is larger than the sum of its proper divisors (7444763).

51609061 is an equidigital number, since it uses as much as digits as its factorization.

51609061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9011.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 51609061 is about 7183.9446684952. The cubic root of 51609061 is about 372.3133873017.

Adding to 51609061 its reverse (16090615), we get a palindrome (67699676).

The spelling of 51609061 in words is "fifty-one million, six hundred nine thousand, sixty-one".