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231401422 = 27231591291
BaseRepresentation
bin11011100101011…
…10011111001110
3121010102102002001
431302232133032
5433214321142
634543422514
75506610500
oct1562563716
9533372061
10231401422
1110969034a
12655b4a3a
1338c30125
1422a37d70
15154ad5b7
hexdcae7ce

231401422 has 48 divisors (see below), whose sum is σ = 424189440. Its totient is φ = 94273200.

The previous prime is 231401407. The next prime is 231401431. The reversal of 231401422 is 224104132.

It is a self number, because there is not a number n which added to its sum of digits gives 231401422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178597 + ... + 179887.

It is an arithmetic number, because the mean of its divisors is an integer number (8837280).

Almost surely, 2231401422 is an apocalyptic number.

231401422 is a deficient number, since it is larger than the sum of its proper divisors (192788018).

231401422 is a wasteful number, since it uses less digits than its factorization.

231401422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 231401422 is about 15211.8842356889. The cubic root of 231401422 is about 613.9344556148.

Adding to 231401422 its reverse (224104132), we get a palindrome (455505554).

The spelling of 231401422 in words is "two hundred thirty-one million, four hundred one thousand, four hundred twenty-two".

Divisors: 1 2 7 14 31 49 59 62 98 118 217 413 434 826 1291 1519 1829 2582 2891 3038 3658 5782 9037 12803 18074 25606 40021 63259 76169 80042 89621 126518 152338 179242 280147 533183 560294 1066366 1961029 2361239 3732281 3922058 4722478 7464562 16528673 33057346 115700711 231401422