51101587 has 4 divisors (see below), whose sum is σ = 52290040. Its totient is φ = 49913136.

The previous prime is 51101581. The next prime is 51101597. The reversal of 51101587 is 78510115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51101587 - 2¹¹ = 51099539 is a prime.

It is a super-2 number, since 2×51101587² = 5222744387837138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51101581) 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, 594162 + ... + 594247.

It is an arithmetic number, because the mean of its divisors is an integer number (13072510).

Almost surely, 2^51101587 is an apocalyptic number.

51101587 is a deficient number, since it is larger than the sum of its proper divisors (1188453).

51101587 is a wasteful number, since it uses less digits than its factorization.

51101587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188452.

The product of its (nonzero) digits is 1400, while the sum is 28.

The square root of 51101587 is about 7148.5374028538. The cubic root of 51101587 is about 371.0890412378.

The spelling of 51101587 in words is "fifty-one million, one hundred one thousand, five hundred eighty-seven".