55202890 has 16 divisors (see below), whose sum is σ = 102051432. Its totient is φ = 21484224.

The previous prime is 55202879. The next prime is 55202891. The reversal of 55202890 is 9820255.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39576681 + 15626209 = 6291^2 + 3953^2 .

It is not an unprimeable number, because it can be changed into a prime (55202891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74229 + ... + 74968.

Almost surely, 2^55202890 is an apocalyptic number.

55202890 is a deficient number, since it is larger than the sum of its proper divisors (46848542).

55202890 is a wasteful number, since it uses less digits than its factorization.

55202890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149241.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 55202890 is about 7429.8647363192. The cubic root of 55202890 is about 380.7622971066.

The spelling of 55202890 in words is "fifty-five million, two hundred two thousand, eight hundred ninety".