51101001061 has 4 divisors (see below), whose sum is σ = 55746546624. Its totient is φ = 46455455500.

The previous prime is 51101001047. The next prime is 51101001167. The reversal of 51101001061 is 16010010115.

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 51101001061 - 2²³ = 51092612453 is a prime.

It is a super-2 number, since 2×51101001061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101011061) 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, 2322772765 + ... + 2322772786.

It is an arithmetic number, because the mean of its divisors is an integer number (13936636656).

Almost surely, 2^51101001061 is an apocalyptic number.

It is an amenable number.

51101001061 is a deficient number, since it is larger than the sum of its proper divisors (4645545563).

51101001061 is a wasteful number, since it uses less digits than its factorization.

51101001061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645545562.

The product of its (nonzero) digits is 30, while the sum is 16.

Adding to 51101001061 its reverse (16010010115), we get a palindrome (67111011176).

The spelling of 51101001061 in words is "fifty-one billion, one hundred one million, one thousand, sixty-one".