51101005551 has 16 divisors (see below), whose sum is σ = 72305478144. Its totient is φ = 31990984064.

The previous prime is 51101005547. The next prime is 51101005561. The reversal of 51101005551 is 15550010115.

It is not a de Polignac number, because 51101005551 - 2² = 51101005547 is a prime.

It is a super-2 number, since 2×51101005551² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101005561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1108311 + ... + 1153496.

It is an arithmetic number, because the mean of its divisors is an integer number (4519092384).

Almost surely, 2^51101005551 is an apocalyptic number.

51101005551 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51101005551 is a deficient number, since it is larger than the sum of its proper divisors (21204472593).

51101005551 is a wasteful number, since it uses less digits than its factorization.

51101005551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262270.

The product of its (nonzero) digits is 625, while the sum is 24.

Adding to 51101005551 its reverse (15550010115), we get a palindrome (66651015666).

The spelling of 51101005551 in words is "fifty-one billion, one hundred one million, five thousand, five hundred fifty-one".