55221022 has 16 divisors (see below), whose sum is σ = 86694912. Its totient is φ = 26330040.

The previous prime is 55221007. The next prime is 55221037. The reversal of 55221022 is 22012255.

It is an interprime number because it is at equal distance from previous prime (55221007) and next prime (55221037).

It is a super-2 number, since 2×55221022² = 6098722541448968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15247 + ... + 18517.

It is an arithmetic number, because the mean of its divisors is an integer number (5418432).

Almost surely, 2^55221022 is an apocalyptic number.

55221022 is a deficient number, since it is larger than the sum of its proper divisors (31473890).

55221022 is a wasteful number, since it uses less digits than its factorization.

55221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 55221022 is about 7431.0848467771. The cubic root of 55221022 is about 380.8039810729.

Adding to 55221022 its reverse (22012255), we get a palindrome (77233277).

The spelling of 55221022 in words is "fifty-five million, two hundred twenty-one thousand, twenty-two".