51142101 has 4 divisors (see below), whose sum is σ = 68189472. Its totient is φ = 34094732.

The previous prime is 51142097. The next prime is 51142123. The reversal of 51142101 is 10124115.

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 51142101 - 2² = 51142097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51140101) 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, 8523681 + ... + 8523686.

It is an arithmetic number, because the mean of its divisors is an integer number (17047368).

Almost surely, 2^51142101 is an apocalyptic number.

It is an amenable number.

51142101 is a deficient number, since it is larger than the sum of its proper divisors (17047371).

51142101 is a wasteful number, since it uses less digits than its factorization.

51142101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17047370.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 51142101 is about 7151.3705679401. The cubic root of 51142101 is about 371.1870833987.

Adding to 51142101 its reverse (10124115), we get a palindrome (61266216).

The spelling of 51142101 in words is "fifty-one million, one hundred forty-two thousand, one hundred one".