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30431422 = 279722409
BaseRepresentation
bin111010000010…
…1100010111110
32010021002001201
41310011202332
530242301142
63004130114
7516443230
oct164054276
963232051
1030431422
11161a563a
12a23693a
1363c6478
144082250
152a11ab7
hex1d058be

30431422 has 16 divisors (see below), whose sum is σ = 52708320. Its totient is φ = 12907008.

The previous prime is 30431417. The next prime is 30431441. The reversal of 30431422 is 22413403.

It is a self number, because there is not a number n which added to its sum of digits gives 30431422.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9847 + ... + 12562.

It is an arithmetic number, because the mean of its divisors is an integer number (3294270).

Almost surely, 230431422 is an apocalyptic number.

30431422 is a deficient number, since it is larger than the sum of its proper divisors (22276898).

30431422 is a wasteful number, since it uses less digits than its factorization.

30431422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22515.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 30431422 is about 5516.4682542366. The cubic root of 30431422 is about 312.2056432468.

Adding to 30431422 its reverse (22413403), we get a palindrome (52844825).

It can be divided in two parts, 3043 and 1422, that added together give a triangular number (4465 = T94).

The spelling of 30431422 in words is "thirty million, four hundred thirty-one thousand, four hundred twenty-two".

Divisors: 1 2 7 14 97 194 679 1358 22409 44818 156863 313726 2173673 4347346 15215711 30431422