290020225 has 24 divisors (see below), whose sum is σ = 409384512. Its totient is φ = 201748800.

The previous prime is 290020219. The next prime is 290020229. The reversal of 290020225 is 522020092.

It is not a de Polignac number, because 290020225 - 2³ = 290020217 is a prime.

It is a super-2 number, since 2×290020225² = 168223461818101250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 290020196 and 290020205.

It is not an unprimeable number, because it can be changed into a prime (290020229) 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, 16602 + ... + 29251.

It is an arithmetic number, because the mean of its divisors is an integer number (17057688).

Almost surely, 2^290020225 is an apocalyptic number.

290020225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

290020225 is a deficient number, since it is larger than the sum of its proper divisors (119364287).

290020225 is a wasteful number, since it uses less digits than its factorization.

290020225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45897 (or 45892 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 290020225 is about 17029.9801820202. The cubic root of 290020225 is about 661.9259819642.

The spelling of 290020225 in words is "two hundred ninety million, twenty thousand, two hundred twenty-five".