55133570 has 16 divisors (see below), whose sum is σ = 99656568. Its totient is φ = 21960960.

The previous prime is 55133549. The next prime is 55133579. The reversal of 55133570 is 7533155.

It can be written as a sum of positive squares in 4 ways, for example, as 54449641 + 683929 = 7379^2 + 827^2 .

It is not an unprimeable number, because it can be changed into a prime (55133579) 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, 9029 + ... + 13848.

Almost surely, 2^55133570 is an apocalyptic number.

55133570 is a deficient number, since it is larger than the sum of its proper divisors (44522998).

55133570 is a wasteful number, since it uses less digits than its factorization.

55133570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23125.

The product of its (nonzero) digits is 7875, while the sum is 29.

The square root of 55133570 is about 7425.1983138499. The cubic root of 55133570 is about 380.6028519625.

The spelling of 55133570 in words is "fifty-five million, one hundred thirty-three thousand, five hundred seventy".