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215240530 = 2556338231
BaseRepresentation
bin11001101010001…
…00111101010010
3120000000100111111
430311010331102
5420100144110
633205203534
75222341261
oct1465047522
9500010444
10215240530
1110055243a
12601005aa
133579227b
142082c5d8
1513d69e8a
hexcd44f52

215240530 has 16 divisors (see below), whose sum is σ = 388131264. Its totient is φ = 85941040.

The previous prime is 215240449. The next prime is 215240551. The reversal of 215240530 is 35042512.

215240530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 13486 + ... + 24745.

It is an arithmetic number, because the mean of its divisors is an integer number (24258204).

Almost surely, 2215240530 is an apocalyptic number.

215240530 is a deficient number, since it is larger than the sum of its proper divisors (172890734).

215240530 is a wasteful number, since it uses less digits than its factorization.

215240530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38801.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 215240530 is about 14671.0780108348. The cubic root of 215240530 is about 599.2959612425.

The spelling of 215240530 in words is "two hundred fifteen million, two hundred forty thousand, five hundred thirty".

Divisors: 1 2 5 10 563 1126 2815 5630 38231 76462 191155 382310 21524053 43048106 107620265 215240530