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625540031 is a prime number
BaseRepresentation
bin100101010010001…
…111101110111111
31121121001201121022
4211102033232333
52240114240111
6142023254355
721334000604
oct4522175677
91547051538
10625540031
112a1112536
121555aa3bb
139c79b83c
145d1146ab
1539db52db
hex2548fbbf

625540031 has 2 divisors, whose sum is σ = 625540032. Its totient is φ = 625540030.

The previous prime is 625539989. The next prime is 625540037. The reversal of 625540031 is 130045526.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625540031 - 222 = 621345727 is a prime.

It is a super-2 number, since 2×6255400312 = 782600660766961922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625540037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312770015 + 312770016.

It is an arithmetic number, because the mean of its divisors is an integer number (312770016).

Almost surely, 2625540031 is an apocalyptic number.

625540031 is a deficient number, since it is larger than the sum of its proper divisors (1).

625540031 is an equidigital number, since it uses as much as digits as its factorization.

625540031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 625540031 is about 25010.7982879396. The cubic root of 625540031 is about 855.2341531202.

Adding to 625540031 its reverse (130045526), we get a palindrome (755585557).

The spelling of 625540031 in words is "six hundred twenty-five million, five hundred forty thousand, thirty-one".