51601610101 has 4 divisors (see below), whose sum is σ = 51602234112. Its totient is φ = 51600986092.

The previous prime is 51601610087. The next prime is 51601610117. The reversal of 51601610101 is 10101610615.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10101610615 = 5 ⋅2020322123.

It is a cyclic number.

It is not a de Polignac number, because 51601610101 - 2⁵ = 51601610069 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 (51601610171) 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, 164821 + ... + 361066.

It is an arithmetic number, because the mean of its divisors is an integer number (12900558528).

Almost surely, 2^51601610101 is an apocalyptic number.

It is an amenable number.

51601610101 is a deficient number, since it is larger than the sum of its proper divisors (624011).

51601610101 is an equidigital number, since it uses as much as digits as its factorization.

51601610101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624010.

The product of its (nonzero) digits is 180, while the sum is 22.

The spelling of 51601610101 in words is "fifty-one billion, six hundred one million, six hundred ten thousand, one hundred one".