290221001 has 16 divisors (see below), whose sum is σ = 340478208. Its totient is φ = 242188800.

The previous prime is 290220989. The next prime is 290221013. The reversal of 290221001 is 100122092.

It is an interprime number because it is at equal distance from previous prime (290220989) and next prime (290221013).

It is not a de Polignac number, because 290221001 - 2¹⁰ = 290219977 is a prime.

It is a super-3 number, since 3×290221001³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (290221021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212561 + ... + 213921.

It is an arithmetic number, because the mean of its divisors is an integer number (21279888).

Almost surely, 2^290221001 is an apocalyptic number.

It is an amenable number.

290221001 is a deficient number, since it is larger than the sum of its proper divisors (50257207).

290221001 is a wasteful number, since it uses less digits than its factorization.

290221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 290221001 is about 17035.8739429476. The cubic root of 290221001 is about 662.0786933770.

Adding to 290221001 its reverse (100122092), we get a palindrome (390343093).

The spelling of 290221001 in words is "two hundred ninety million, two hundred twenty-one thousand, one".