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31420234 = 215710117
BaseRepresentation
bin111011111011…
…0111101001010
32012010022110101
41313312331022
531020421414
63041240014
7531032116
oct167667512
965108411
1031420234
111681053a
12a63300a
136681571
14425c746
152b59a74
hex1df6f4a

31420234 has 4 divisors (see below), whose sum is σ = 47130354. Its totient is φ = 15710116.

The previous prime is 31420223. The next prime is 31420303. The reversal of 31420234 is 43202413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23280625 + 8139609 = 4825^2 + 2853^2 .

It is a super-2 number, since 2×314202342 = 1974462209229512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7855057 + ... + 7855060.

Almost surely, 231420234 is an apocalyptic number.

31420234 is a deficient number, since it is larger than the sum of its proper divisors (15710120).

31420234 is a wasteful number, since it uses less digits than its factorization.

31420234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15710119.

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

The square root of 31420234 is about 5605.3754557567. The cubic root of 31420234 is about 315.5511774411.

Adding to 31420234 its reverse (43202413), we get a palindrome (74622647).

The spelling of 31420234 in words is "thirty-one million, four hundred twenty thousand, two hundred thirty-four".

Divisors: 1 2 15710117 31420234