51610061 has 4 divisors (see below), whose sum is σ = 54326400. Its totient is φ = 48893724.

The previous prime is 51610057. The next prime is 51610081. The reversal of 51610061 is 16001615.

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 a cyclic number.

It is not a de Polignac number, because 51610061 - 2² = 51610057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51610081) 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, 1358141 + ... + 1358178.

It is an arithmetic number, because the mean of its divisors is an integer number (13581600).

Almost surely, 2^51610061 is an apocalyptic number.

It is an amenable number.

51610061 is a deficient number, since it is larger than the sum of its proper divisors (2716339).

51610061 is a wasteful number, since it uses less digits than its factorization.

51610061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716338.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 51610061 is about 7184.0142678032. The cubic root of 51610061 is about 372.3157919891.

Adding to 51610061 its reverse (16001615), we get a palindrome (67611676).

The spelling of 51610061 in words is "fifty-one million, six hundred ten thousand, sixty-one".