90157555 has 8 divisors (see below), whose sum is σ = 109671552. Its totient is φ = 71137728.

The previous prime is 90157531. The next prime is 90157559. The reversal of 90157555 is 55575109.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90157555 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90157559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123139 + ... + 123868.

It is an arithmetic number, because the mean of its divisors is an integer number (13708944).

Almost surely, 2^90157555 is an apocalyptic number.

90157555 is a deficient number, since it is larger than the sum of its proper divisors (19513997).

90157555 is a wasteful number, since it uses less digits than its factorization.

90157555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247085.

The product of its (nonzero) digits is 39375, while the sum is 37.

The square root of 90157555 is about 9495.1332270801. The cubic root of 90157555 is about 448.4018287699.

The spelling of 90157555 in words is "ninety million, one hundred fifty-seven thousand, five hundred fifty-five".