87751155 has 16 divisors (see below), whose sum is σ = 140926464. Its totient is φ = 46625760.

The previous prime is 87751151. The next prime is 87751171. The reversal of 87751155 is 55115778.

It is a happy number.

It is not a de Polignac number, because 87751155 - 2² = 87751151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87751151) 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, 6729 + ... + 14858.

It is an arithmetic number, because the mean of its divisors is an integer number (8807904).

Almost surely, 2^87751155 is an apocalyptic number.

87751155 is a deficient number, since it is larger than the sum of its proper divisors (53175309).

87751155 is a wasteful number, since it uses less digits than its factorization.

87751155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21866.

The product of its digits is 49000, while the sum is 39.

The square root of 87751155 is about 9367.5586467340. The cubic root of 87751155 is about 444.3763599295.

The spelling of 87751155 in words is "eighty-seven million, seven hundred fifty-one thousand, one hundred fifty-five".