83507553 has 24 divisors (see below), whose sum is σ = 128255400. Its totient is φ = 52176384.

The previous prime is 83507551. The next prime is 83507561. The reversal of 83507553 is 35570538.

It can be written as a sum of positive squares in 4 ways, for example, as 28643904 + 54863649 = 5352^2 + 7407^2 .

It is not a de Polignac number, because 83507553 - 2¹ = 83507551 is a prime.

It is a super-2 number, since 2×83507553² = 13947022816095618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83507551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40143 + ... + 42171.

It is an arithmetic number, because the mean of its divisors is an integer number (5343975).

Almost surely, 2^83507553 is an apocalyptic number.

It is an amenable number.

83507553 is a deficient number, since it is larger than the sum of its proper divisors (44747847).

83507553 is a wasteful number, since it uses less digits than its factorization.

83507553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 83507553 is about 9138.2467136754. The cubic root of 83507553 is about 437.0944102862.

The spelling of 83507553 in words is "eighty-three million, five hundred seven thousand, five hundred fifty-three".