88515551 has 4 divisors (see below), whose sum is σ = 88555704. Its totient is φ = 88475400.

The previous prime is 88515541. The next prime is 88515577. The reversal of 88515551 is 15551588.

It is a happy number.

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 88515551 - 2¹⁰ = 88514527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88515541) 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, 16565 + ... + 21246.

It is an arithmetic number, because the mean of its divisors is an integer number (22138926).

Almost surely, 2^88515551 is an apocalyptic number.

88515551 is a deficient number, since it is larger than the sum of its proper divisors (40153).

88515551 is a wasteful number, since it uses less digits than its factorization.

88515551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40152.

The product of its digits is 40000, while the sum is 38.

The square root of 88515551 is about 9408.2703511326. The cubic root of 88515551 is about 445.6629448834.

The spelling of 88515551 in words is "eighty-eight million, five hundred fifteen thousand, five hundred fifty-one".