51156101 has 4 divisors (see below), whose sum is σ = 51181152. Its totient is φ = 51131052.

The previous prime is 51156097. The next prime is 51156109. The reversal of 51156101 is 10165115.

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 51156101 - 2² = 51156097 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 (51156109) 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, 9161 + ... + 13646.

It is an arithmetic number, because the mean of its divisors is an integer number (12795288).

Almost surely, 2^51156101 is an apocalyptic number.

It is an amenable number.

51156101 is a deficient number, since it is larger than the sum of its proper divisors (25051).

51156101 is a wasteful number, since it uses less digits than its factorization.

51156101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25050.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 51156101 is about 7152.3493343097. The cubic root of 51156101 is about 371.2209507666.

The spelling of 51156101 in words is "fifty-one million, one hundred fifty-six thousand, one hundred one".