115521554 has 4 divisors (see below), whose sum is σ = 173282334. Its totient is φ = 57760776.

The previous prime is 115521547. The next prime is 115521557. The reversal of 115521554 is 455125511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455125511 = 4691 ⋅97021.

It can be written as a sum of positive squares in only one way, i.e., 110355025 + 5166529 = 10505^2 + 2273^2 .

It is not an unprimeable number, because it can be changed into a prime (115521557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28880387 + ... + 28880390.

Almost surely, 2^115521554 is an apocalyptic number.

115521554 is a deficient number, since it is larger than the sum of its proper divisors (57760780).

115521554 is an equidigital number, since it uses as much as digits as its factorization.

115521554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57760779.

The product of its digits is 5000, while the sum is 29.

The square root of 115521554 is about 10748.0953661567. The cubic root of 115521554 is about 487.0284604601.

The spelling of 115521554 in words is "one hundred fifteen million, five hundred twenty-one thousand, five hundred fifty-four".